1 /*
2 * Copyright (c) 1997, 2013, 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.
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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
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23 */
24
25 #ifndef SHARE_VM_OPTO_TYPE_HPP
26 #define SHARE_VM_OPTO_TYPE_HPP
27
28 #include "libadt/port.hpp"
29 #include "opto/adlcVMDeps.hpp"
30 #include "runtime/handles.hpp"
31
32 // Portions of code courtesy of Clifford Click
33
34 // Optimization - Graph Style
35
36
37 // This class defines a Type lattice. The lattice is used in the constant
38 // propagation algorithms, and for some type-checking of the iloc code.
39 // Basic types include RSD's (lower bound, upper bound, stride for integers),
40 // float & double precision constants, sets of data-labels and code-labels.
41 // The complete lattice is described below. Subtypes have no relationship to
42 // up or down in the lattice; that is entirely determined by the behavior of
43 // the MEET/JOIN functions.
44
45 class Dict;
46 class Type;
47 class TypeD;
48 class TypeF;
49 class TypeInt;
50 class TypeLong;
51 class TypeNarrowPtr;
52 class TypeNarrowOop;
53 class TypeNarrowKlass;
54 class TypeAry;
55 class TypeTuple;
56 class TypeVect;
57 class TypeVectS;
58 class TypeVectD;
59 class TypeVectX;
60 class TypeVectY;
61 class TypePtr;
62 class TypeRawPtr;
63 class TypeOopPtr;
64 class TypeInstPtr;
65 class TypeAryPtr;
66 class TypeKlassPtr;
67 class TypeMetadataPtr;
68
69 //------------------------------Type-------------------------------------------
70 // Basic Type object, represents a set of primitive Values.
71 // Types are hash-cons'd into a private class dictionary, so only one of each
72 // different kind of Type exists. Types are never modified after creation, so
73 // all their interesting fields are constant.
74 class Type {
75 friend class VMStructs;
76
77 public:
78 enum TYPES {
79 Bad=0, // Type check
80 Control, // Control of code (not in lattice)
81 Top, // Top of the lattice
82 Int, // Integer range (lo-hi)
83 Long, // Long integer range (lo-hi)
84 Half, // Placeholder half of doubleword
85 NarrowOop, // Compressed oop pointer
86 NarrowKlass, // Compressed klass pointer
87
88 Tuple, // Method signature or object layout
89 Array, // Array types
90 VectorS, // 32bit Vector types
91 VectorD, // 64bit Vector types
92 VectorX, // 128bit Vector types
93 VectorY, // 256bit Vector types
94
95 AnyPtr, // Any old raw, klass, inst, or array pointer
96 RawPtr, // Raw (non-oop) pointers
97 OopPtr, // Any and all Java heap entities
98 InstPtr, // Instance pointers (non-array objects)
99 AryPtr, // Array pointers
100 // (Ptr order matters: See is_ptr, isa_ptr, is_oopptr, isa_oopptr.)
101
102 MetadataPtr, // Generic metadata
103 KlassPtr, // Klass pointers
104
105 Function, // Function signature
106 Abio, // Abstract I/O
107 Return_Address, // Subroutine return address
108 Memory, // Abstract store
109 FloatTop, // No float value
110 FloatCon, // Floating point constant
111 FloatBot, // Any float value
112 DoubleTop, // No double value
113 DoubleCon, // Double precision constant
114 DoubleBot, // Any double value
115 Bottom, // Bottom of lattice
116 lastype // Bogus ending type (not in lattice)
117 };
118
119 // Signal values for offsets from a base pointer
120 enum OFFSET_SIGNALS {
121 OffsetTop = -2000000000, // undefined offset
122 OffsetBot = -2000000001 // any possible offset
123 };
124
125 // Min and max WIDEN values.
126 enum WIDEN {
127 WidenMin = 0,
128 WidenMax = 3
129 };
130
131 private:
132 typedef struct {
133 const TYPES dual_type;
134 const BasicType basic_type;
135 const char* msg;
136 const bool isa_oop;
137 const int ideal_reg;
138 const relocInfo::relocType reloc;
139 } TypeInfo;
140
141 // Dictionary of types shared among compilations.
142 static Dict* _shared_type_dict;
143 static TypeInfo _type_info[];
144
145 static int uhash( const Type *const t );
146 // Structural equality check. Assumes that cmp() has already compared
147 // the _base types and thus knows it can cast 't' appropriately.
148 virtual bool eq( const Type *t ) const;
149
150 // Top-level hash-table of types
151 static Dict *type_dict() {
152 return Compile::current()->type_dict();
153 }
154
155 // DUAL operation: reflect around lattice centerline. Used instead of
156 // join to ensure my lattice is symmetric up and down. Dual is computed
157 // lazily, on demand, and cached in _dual.
158 const Type *_dual; // Cached dual value
159 // Table for efficient dualing of base types
160 static const TYPES dual_type[lastype];
161
162 #ifdef ASSERT
163 // One type is interface, the other is oop
164 virtual bool interface_vs_oop_helper(const Type *t) const;
165 #endif
166
167 const Type *meet_helper(const Type *t, bool include_speculative) const;
168
169 protected:
170 // Each class of type is also identified by its base.
171 const TYPES _base; // Enum of Types type
172
173 Type( TYPES t ) : _dual(NULL), _base(t) {} // Simple types
174 // ~Type(); // Use fast deallocation
175 const Type *hashcons(); // Hash-cons the type
176 virtual const Type *filter_helper(const Type *kills, bool include_speculative) const;
177 const Type *join_helper(const Type *t, bool include_speculative) const {
178 return dual()->meet_helper(t->dual(), include_speculative)->dual();
179 }
180
181 public:
182
183 inline void* operator new( size_t x ) throw() {
184 Compile* compile = Compile::current();
185 compile->set_type_last_size(x);
186 void *temp = compile->type_arena()->Amalloc_D(x);
187 compile->set_type_hwm(temp);
188 return temp;
189 }
190 inline void operator delete( void* ptr ) {
191 Compile* compile = Compile::current();
192 compile->type_arena()->Afree(ptr,compile->type_last_size());
193 }
194
195 // Initialize the type system for a particular compilation.
196 static void Initialize(Compile* compile);
197
198 // Initialize the types shared by all compilations.
199 static void Initialize_shared(Compile* compile);
200
201 TYPES base() const {
202 assert(_base > Bad && _base < lastype, "sanity");
203 return _base;
204 }
205
206 // Create a new hash-consd type
207 static const Type *make(enum TYPES);
208 // Test for equivalence of types
209 static int cmp( const Type *const t1, const Type *const t2 );
210 // Test for higher or equal in lattice
211 // Variant that drops the speculative part of the types
212 int higher_equal(const Type *t) const {
213 return !cmp(meet(t),t->remove_speculative());
214 }
215 // Variant that keeps the speculative part of the types
216 int higher_equal_speculative(const Type *t) const {
217 return !cmp(meet_speculative(t),t);
218 }
219
220 // MEET operation; lower in lattice.
221 // Variant that drops the speculative part of the types
222 const Type *meet(const Type *t) const {
223 return meet_helper(t, false);
224 }
225 // Variant that keeps the speculative part of the types
226 const Type *meet_speculative(const Type *t) const {
227 return meet_helper(t, true);
228 }
229 // WIDEN: 'widens' for Ints and other range types
230 virtual const Type *widen( const Type *old, const Type* limit ) const { return this; }
231 // NARROW: complement for widen, used by pessimistic phases
232 virtual const Type *narrow( const Type *old ) const { return this; }
233
234 // DUAL operation: reflect around lattice centerline. Used instead of
235 // join to ensure my lattice is symmetric up and down.
236 const Type *dual() const { return _dual; }
237
238 // Compute meet dependent on base type
239 virtual const Type *xmeet( const Type *t ) const;
240 virtual const Type *xdual() const; // Compute dual right now.
241
242 // JOIN operation; higher in lattice. Done by finding the dual of the
243 // meet of the dual of the 2 inputs.
244 // Variant that drops the speculative part of the types
245 const Type *join(const Type *t) const {
246 return join_helper(t, false);
247 }
248 // Variant that keeps the speculative part of the types
249 const Type *join_speculative(const Type *t) const {
250 return join_helper(t, true);
251 }
252
253 // Modified version of JOIN adapted to the needs Node::Value.
254 // Normalizes all empty values to TOP. Does not kill _widen bits.
255 // Currently, it also works around limitations involving interface types.
256 // Variant that drops the speculative part of the types
257 const Type *filter(const Type *kills) const {
258 return filter_helper(kills, false);
259 }
260 // Variant that keeps the speculative part of the types
261 const Type *filter_speculative(const Type *kills) const {
262 return filter_helper(kills, true);
263 }
264
265 #ifdef ASSERT
266 // One type is interface, the other is oop
267 virtual bool interface_vs_oop(const Type *t) const;
268 #endif
269
270 // Returns true if this pointer points at memory which contains a
271 // compressed oop references.
272 bool is_ptr_to_narrowoop() const;
273 bool is_ptr_to_narrowklass() const;
274
275 bool is_ptr_to_boxing_obj() const;
276
277
278 // Convenience access
279 float getf() const;
280 double getd() const;
281
282 const TypeInt *is_int() const;
283 const TypeInt *isa_int() const; // Returns NULL if not an Int
284 const TypeLong *is_long() const;
285 const TypeLong *isa_long() const; // Returns NULL if not a Long
286 const TypeD *isa_double() const; // Returns NULL if not a Double{Top,Con,Bot}
287 const TypeD *is_double_constant() const; // Asserts it is a DoubleCon
288 const TypeD *isa_double_constant() const; // Returns NULL if not a DoubleCon
289 const TypeF *isa_float() const; // Returns NULL if not a Float{Top,Con,Bot}
290 const TypeF *is_float_constant() const; // Asserts it is a FloatCon
291 const TypeF *isa_float_constant() const; // Returns NULL if not a FloatCon
292 const TypeTuple *is_tuple() const; // Collection of fields, NOT a pointer
293 const TypeAry *is_ary() const; // Array, NOT array pointer
294 const TypeVect *is_vect() const; // Vector
295 const TypeVect *isa_vect() const; // Returns NULL if not a Vector
296 const TypePtr *is_ptr() const; // Asserts it is a ptr type
297 const TypePtr *isa_ptr() const; // Returns NULL if not ptr type
298 const TypeRawPtr *isa_rawptr() const; // NOT Java oop
299 const TypeRawPtr *is_rawptr() const; // Asserts is rawptr
300 const TypeNarrowOop *is_narrowoop() const; // Java-style GC'd pointer
301 const TypeNarrowOop *isa_narrowoop() const; // Returns NULL if not oop ptr type
302 const TypeNarrowKlass *is_narrowklass() const; // compressed klass pointer
303 const TypeNarrowKlass *isa_narrowklass() const;// Returns NULL if not oop ptr type
304 const TypeOopPtr *isa_oopptr() const; // Returns NULL if not oop ptr type
305 const TypeOopPtr *is_oopptr() const; // Java-style GC'd pointer
306 const TypeInstPtr *isa_instptr() const; // Returns NULL if not InstPtr
307 const TypeInstPtr *is_instptr() const; // Instance
308 const TypeAryPtr *isa_aryptr() const; // Returns NULL if not AryPtr
309 const TypeAryPtr *is_aryptr() const; // Array oop
310
311 const TypeMetadataPtr *isa_metadataptr() const; // Returns NULL if not oop ptr type
312 const TypeMetadataPtr *is_metadataptr() const; // Java-style GC'd pointer
313 const TypeKlassPtr *isa_klassptr() const; // Returns NULL if not KlassPtr
314 const TypeKlassPtr *is_klassptr() const; // assert if not KlassPtr
315
316 virtual bool is_finite() const; // Has a finite value
317 virtual bool is_nan() const; // Is not a number (NaN)
318
319 // Returns this ptr type or the equivalent ptr type for this compressed pointer.
320 const TypePtr* make_ptr() const;
321
322 // Returns this oopptr type or the equivalent oopptr type for this compressed pointer.
323 // Asserts if the underlying type is not an oopptr or narrowoop.
324 const TypeOopPtr* make_oopptr() const;
325
326 // Returns this compressed pointer or the equivalent compressed version
327 // of this pointer type.
328 const TypeNarrowOop* make_narrowoop() const;
329
330 // Returns this compressed klass pointer or the equivalent
331 // compressed version of this pointer type.
332 const TypeNarrowKlass* make_narrowklass() const;
333
334 // Special test for register pressure heuristic
335 bool is_floatingpoint() const; // True if Float or Double base type
336
337 // Do you have memory, directly or through a tuple?
338 bool has_memory( ) const;
339
340 // TRUE if type is a singleton
341 virtual bool singleton(void) const;
342
343 // TRUE if type is above the lattice centerline, and is therefore vacuous
344 virtual bool empty(void) const;
345
346 // Return a hash for this type. The hash function is public so ConNode
347 // (constants) can hash on their constant, which is represented by a Type.
348 virtual int hash() const;
349
350 // Map ideal registers (machine types) to ideal types
351 static const Type *mreg2type[];
352
353 // Printing, statistics
354 #ifndef PRODUCT
355 void dump_on(outputStream *st) const;
356 void dump() const {
357 dump_on(tty);
358 }
359 virtual void dump2( Dict &d, uint depth, outputStream *st ) const;
360 static void dump_stats();
361 #endif
362 void typerr(const Type *t) const; // Mixing types error
363
364 // Create basic type
365 static const Type* get_const_basic_type(BasicType type) {
366 assert((uint)type <= T_CONFLICT && _const_basic_type[type] != NULL, "bad type");
367 return _const_basic_type[type];
368 }
369
370 // Mapping to the array element's basic type.
371 BasicType array_element_basic_type() const;
372
373 // Create standard type for a ciType:
374 static const Type* get_const_type(ciType* type);
375
376 // Create standard zero value:
377 static const Type* get_zero_type(BasicType type) {
378 assert((uint)type <= T_CONFLICT && _zero_type[type] != NULL, "bad type");
379 return _zero_type[type];
380 }
381
382 // Report if this is a zero value (not top).
383 bool is_zero_type() const {
384 BasicType type = basic_type();
385 if (type == T_VOID || type >= T_CONFLICT)
386 return false;
387 else
388 return (this == _zero_type[type]);
389 }
390
391 // Convenience common pre-built types.
392 static const Type *ABIO;
393 static const Type *BOTTOM;
394 static const Type *CONTROL;
395 static const Type *DOUBLE;
396 static const Type *FLOAT;
397 static const Type *HALF;
398 static const Type *MEMORY;
399 static const Type *MULTI;
400 static const Type *RETURN_ADDRESS;
401 static const Type *TOP;
402
403 // Mapping from compiler type to VM BasicType
404 BasicType basic_type() const { return _type_info[_base].basic_type; }
405 int ideal_reg() const { return _type_info[_base].ideal_reg; }
406 const char* msg() const { return _type_info[_base].msg; }
407 bool isa_oop_ptr() const { return _type_info[_base].isa_oop; }
408 relocInfo::relocType reloc() const { return _type_info[_base].reloc; }
409
410 // Mapping from CI type system to compiler type:
411 static const Type* get_typeflow_type(ciType* type);
412
413 static const Type* make_from_constant(ciConstant constant,
414 bool require_constant = false,
415 bool is_autobox_cache = false);
416
417 // Speculative type. See TypeInstPtr
418 virtual const TypeOopPtr* speculative() const { return NULL; }
419 virtual ciKlass* speculative_type() const { return NULL; }
420 const Type* maybe_remove_speculative(bool include_speculative) const;
421 virtual const Type* remove_speculative() const { return this; }
422
423 virtual bool would_improve_type(ciKlass* exact_kls, int inline_depth) const {
424 return exact_kls != NULL;
425 }
426
427 private:
428 // support arrays
429 static const BasicType _basic_type[];
430 static const Type* _zero_type[T_CONFLICT+1];
431 static const Type* _const_basic_type[T_CONFLICT+1];
432 };
433
434 //------------------------------TypeF------------------------------------------
435 // Class of Float-Constant Types.
436 class TypeF : public Type {
437 TypeF( float f ) : Type(FloatCon), _f(f) {};
438 public:
439 virtual bool eq( const Type *t ) const;
440 virtual int hash() const; // Type specific hashing
441 virtual bool singleton(void) const; // TRUE if type is a singleton
442 virtual bool empty(void) const; // TRUE if type is vacuous
443 public:
444 const float _f; // Float constant
445
446 static const TypeF *make(float f);
447
448 virtual bool is_finite() const; // Has a finite value
449 virtual bool is_nan() const; // Is not a number (NaN)
450
451 virtual const Type *xmeet( const Type *t ) const;
452 virtual const Type *xdual() const; // Compute dual right now.
453 // Convenience common pre-built types.
454 static const TypeF *ZERO; // positive zero only
455 static const TypeF *ONE;
456 #ifndef PRODUCT
457 virtual void dump2( Dict &d, uint depth, outputStream *st ) const;
458 #endif
459 };
460
461 //------------------------------TypeD------------------------------------------
462 // Class of Double-Constant Types.
463 class TypeD : public Type {
464 TypeD( double d ) : Type(DoubleCon), _d(d) {};
465 public:
466 virtual bool eq( const Type *t ) const;
467 virtual int hash() const; // Type specific hashing
468 virtual bool singleton(void) const; // TRUE if type is a singleton
469 virtual bool empty(void) const; // TRUE if type is vacuous
470 public:
471 const double _d; // Double constant
472
473 static const TypeD *make(double d);
474
475 virtual bool is_finite() const; // Has a finite value
476 virtual bool is_nan() const; // Is not a number (NaN)
477
478 virtual const Type *xmeet( const Type *t ) const;
479 virtual const Type *xdual() const; // Compute dual right now.
480 // Convenience common pre-built types.
481 static const TypeD *ZERO; // positive zero only
482 static const TypeD *ONE;
483 #ifndef PRODUCT
484 virtual void dump2( Dict &d, uint depth, outputStream *st ) const;
485 #endif
486 };
487
488 //------------------------------TypeInt----------------------------------------
489 // Class of integer ranges, the set of integers between a lower bound and an
490 // upper bound, inclusive.
491 class TypeInt : public Type {
492 TypeInt( jint lo, jint hi, int w );
493 protected:
494 virtual const Type *filter_helper(const Type *kills, bool include_speculative) const;
495
496 public:
497 typedef jint NativeType;
498 virtual bool eq( const Type *t ) const;
499 virtual int hash() const; // Type specific hashing
500 virtual bool singleton(void) const; // TRUE if type is a singleton
501 virtual bool empty(void) const; // TRUE if type is vacuous
502 const jint _lo, _hi; // Lower bound, upper bound
503 const short _widen; // Limit on times we widen this sucker
504
505 static const TypeInt *make(jint lo);
506 // must always specify w
507 static const TypeInt *make(jint lo, jint hi, int w);
508
509 // Check for single integer
510 int is_con() const { return _lo==_hi; }
511 bool is_con(int i) const { return is_con() && _lo == i; }
512 jint get_con() const { assert( is_con(), "" ); return _lo; }
513
514 virtual bool is_finite() const; // Has a finite value
515
516 virtual const Type *xmeet( const Type *t ) const;
517 virtual const Type *xdual() const; // Compute dual right now.
518 virtual const Type *widen( const Type *t, const Type* limit_type ) const;
519 virtual const Type *narrow( const Type *t ) const;
520 // Do not kill _widen bits.
521 // Convenience common pre-built types.
522 static const TypeInt *MINUS_1;
523 static const TypeInt *ZERO;
524 static const TypeInt *ONE;
525 static const TypeInt *BOOL;
526 static const TypeInt *CC;
527 static const TypeInt *CC_LT; // [-1] == MINUS_1
528 static const TypeInt *CC_GT; // [1] == ONE
529 static const TypeInt *CC_EQ; // [0] == ZERO
530 static const TypeInt *CC_LE; // [-1,0]
531 static const TypeInt *CC_GE; // [0,1] == BOOL (!)
532 static const TypeInt *BYTE;
533 static const TypeInt *UBYTE;
534 static const TypeInt *CHAR;
535 static const TypeInt *SHORT;
536 static const TypeInt *POS;
537 static const TypeInt *POS1;
538 static const TypeInt *INT;
539 static const TypeInt *SYMINT; // symmetric range [-max_jint..max_jint]
540 static const TypeInt *TYPE_DOMAIN; // alias for TypeInt::INT
541
542 static const TypeInt *as_self(const Type *t) { return t->is_int(); }
543 #ifndef PRODUCT
544 virtual void dump2( Dict &d, uint depth, outputStream *st ) const;
545 #endif
546 };
547
548
549 //------------------------------TypeLong---------------------------------------
550 // Class of long integer ranges, the set of integers between a lower bound and
551 // an upper bound, inclusive.
552 class TypeLong : public Type {
553 TypeLong( jlong lo, jlong hi, int w );
554 protected:
555 // Do not kill _widen bits.
556 virtual const Type *filter_helper(const Type *kills, bool include_speculative) const;
557 public:
558 typedef jlong NativeType;
559 virtual bool eq( const Type *t ) const;
560 virtual int hash() const; // Type specific hashing
561 virtual bool singleton(void) const; // TRUE if type is a singleton
562 virtual bool empty(void) const; // TRUE if type is vacuous
563 public:
564 const jlong _lo, _hi; // Lower bound, upper bound
565 const short _widen; // Limit on times we widen this sucker
566
567 static const TypeLong *make(jlong lo);
568 // must always specify w
569 static const TypeLong *make(jlong lo, jlong hi, int w);
570
571 // Check for single integer
572 int is_con() const { return _lo==_hi; }
573 bool is_con(int i) const { return is_con() && _lo == i; }
574 jlong get_con() const { assert( is_con(), "" ); return _lo; }
575
576 // Check for positive 32-bit value.
577 int is_positive_int() const { return _lo >= 0 && _hi <= (jlong)max_jint; }
578
579 virtual bool is_finite() const; // Has a finite value
580
581
582 virtual const Type *xmeet( const Type *t ) const;
583 virtual const Type *xdual() const; // Compute dual right now.
584 virtual const Type *widen( const Type *t, const Type* limit_type ) const;
585 virtual const Type *narrow( const Type *t ) const;
586 // Convenience common pre-built types.
587 static const TypeLong *MINUS_1;
588 static const TypeLong *ZERO;
589 static const TypeLong *ONE;
590 static const TypeLong *POS;
591 static const TypeLong *LONG;
592 static const TypeLong *INT; // 32-bit subrange [min_jint..max_jint]
593 static const TypeLong *UINT; // 32-bit unsigned [0..max_juint]
594 static const TypeLong *TYPE_DOMAIN; // alias for TypeLong::LONG
595
596 // static convenience methods.
597 static const TypeLong *as_self(const Type *t) { return t->is_long(); }
598
599 #ifndef PRODUCT
600 virtual void dump2( Dict &d, uint, outputStream *st ) const;// Specialized per-Type dumping
601 #endif
602 };
603
604 //------------------------------TypeTuple--------------------------------------
605 // Class of Tuple Types, essentially type collections for function signatures
606 // and class layouts. It happens to also be a fast cache for the HotSpot
607 // signature types.
608 class TypeTuple : public Type {
609 TypeTuple( uint cnt, const Type **fields ) : Type(Tuple), _cnt(cnt), _fields(fields) { }
610 public:
611 virtual bool eq( const Type *t ) const;
612 virtual int hash() const; // Type specific hashing
613 virtual bool singleton(void) const; // TRUE if type is a singleton
614 virtual bool empty(void) const; // TRUE if type is vacuous
615
616 public:
617 const uint _cnt; // Count of fields
618 const Type ** const _fields; // Array of field types
619
620 // Accessors:
621 uint cnt() const { return _cnt; }
622 const Type* field_at(uint i) const {
623 assert(i < _cnt, "oob");
624 return _fields[i];
625 }
626 void set_field_at(uint i, const Type* t) {
627 assert(i < _cnt, "oob");
628 _fields[i] = t;
629 }
630
631 static const TypeTuple *make( uint cnt, const Type **fields );
632 static const TypeTuple *make_range(ciSignature *sig);
633 static const TypeTuple *make_domain(ciInstanceKlass* recv, ciSignature *sig);
634
635 // Subroutine call type with space allocated for argument types
636 static const Type **fields( uint arg_cnt );
637
638 virtual const Type *xmeet( const Type *t ) const;
639 virtual const Type *xdual() const; // Compute dual right now.
640 // Convenience common pre-built types.
641 static const TypeTuple *IFBOTH;
642 static const TypeTuple *IFFALSE;
643 static const TypeTuple *IFTRUE;
644 static const TypeTuple *IFNEITHER;
645 static const TypeTuple *LOOPBODY;
646 static const TypeTuple *MEMBAR;
647 static const TypeTuple *STORECONDITIONAL;
648 static const TypeTuple *START_I2C;
649 static const TypeTuple *INT_PAIR;
650 static const TypeTuple *LONG_PAIR;
651 static const TypeTuple *INT_CC_PAIR;
652 static const TypeTuple *LONG_CC_PAIR;
653 #ifndef PRODUCT
654 virtual void dump2( Dict &d, uint, outputStream *st ) const; // Specialized per-Type dumping
655 #endif
656 };
657
658 //------------------------------TypeAry----------------------------------------
659 // Class of Array Types
660 class TypeAry : public Type {
661 TypeAry(const Type* elem, const TypeInt* size, bool stable) : Type(Array),
662 _elem(elem), _size(size), _stable(stable) {}
663 public:
664 virtual bool eq( const Type *t ) const;
665 virtual int hash() const; // Type specific hashing
666 virtual bool singleton(void) const; // TRUE if type is a singleton
667 virtual bool empty(void) const; // TRUE if type is vacuous
668
669 private:
670 const Type *_elem; // Element type of array
671 const TypeInt *_size; // Elements in array
672 const bool _stable; // Are elements @Stable?
673 friend class TypeAryPtr;
674
675 public:
676 static const TypeAry* make(const Type* elem, const TypeInt* size, bool stable = false);
677
678 virtual const Type *xmeet( const Type *t ) const;
679 virtual const Type *xdual() const; // Compute dual right now.
680 bool ary_must_be_exact() const; // true if arrays of such are never generic
681 virtual const Type* remove_speculative() const;
682 #ifdef ASSERT
683 // One type is interface, the other is oop
684 virtual bool interface_vs_oop(const Type *t) const;
685 #endif
686 #ifndef PRODUCT
687 virtual void dump2( Dict &d, uint, outputStream *st ) const; // Specialized per-Type dumping
688 #endif
689 };
690
691 //------------------------------TypeVect---------------------------------------
692 // Class of Vector Types
693 class TypeVect : public Type {
694 const Type* _elem; // Vector's element type
695 const uint _length; // Elements in vector (power of 2)
696
697 protected:
698 TypeVect(TYPES t, const Type* elem, uint length) : Type(t),
699 _elem(elem), _length(length) {}
700
701 public:
702 const Type* element_type() const { return _elem; }
703 BasicType element_basic_type() const { return _elem->array_element_basic_type(); }
704 uint length() const { return _length; }
705 uint length_in_bytes() const {
706 return _length * type2aelembytes(element_basic_type());
707 }
708
709 virtual bool eq(const Type *t) const;
710 virtual int hash() const; // Type specific hashing
711 virtual bool singleton(void) const; // TRUE if type is a singleton
712 virtual bool empty(void) const; // TRUE if type is vacuous
713
714 static const TypeVect *make(const BasicType elem_bt, uint length) {
715 // Use bottom primitive type.
716 return make(get_const_basic_type(elem_bt), length);
717 }
718 // Used directly by Replicate nodes to construct singleton vector.
719 static const TypeVect *make(const Type* elem, uint length);
720
721 virtual const Type *xmeet( const Type *t) const;
722 virtual const Type *xdual() const; // Compute dual right now.
723
724 static const TypeVect *VECTS;
725 static const TypeVect *VECTD;
726 static const TypeVect *VECTX;
727 static const TypeVect *VECTY;
728
729 #ifndef PRODUCT
730 virtual void dump2(Dict &d, uint, outputStream *st) const; // Specialized per-Type dumping
731 #endif
732 };
733
734 class TypeVectS : public TypeVect {
735 friend class TypeVect;
736 TypeVectS(const Type* elem, uint length) : TypeVect(VectorS, elem, length) {}
737 };
738
739 class TypeVectD : public TypeVect {
740 friend class TypeVect;
741 TypeVectD(const Type* elem, uint length) : TypeVect(VectorD, elem, length) {}
742 };
743
744 class TypeVectX : public TypeVect {
745 friend class TypeVect;
746 TypeVectX(const Type* elem, uint length) : TypeVect(VectorX, elem, length) {}
747 };
748
749 class TypeVectY : public TypeVect {
750 friend class TypeVect;
751 TypeVectY(const Type* elem, uint length) : TypeVect(VectorY, elem, length) {}
752 };
753
754 //------------------------------TypePtr----------------------------------------
755 // Class of machine Pointer Types: raw data, instances or arrays.
756 // If the _base enum is AnyPtr, then this refers to all of the above.
757 // Otherwise the _base will indicate which subset of pointers is affected,
758 // and the class will be inherited from.
759 class TypePtr : public Type {
760 friend class TypeNarrowPtr;
761 public:
762 enum PTR { TopPTR, AnyNull, Constant, Null, NotNull, BotPTR, lastPTR };
763 protected:
764 TypePtr( TYPES t, PTR ptr, int offset ) : Type(t), _ptr(ptr), _offset(offset) {}
765 virtual bool eq( const Type *t ) const;
766 virtual int hash() const; // Type specific hashing
767 static const PTR ptr_meet[lastPTR][lastPTR];
768 static const PTR ptr_dual[lastPTR];
769 static const char * const ptr_msg[lastPTR];
770
771 public:
772 const int _offset; // Offset into oop, with TOP & BOT
773 const PTR _ptr; // Pointer equivalence class
774
775 const int offset() const { return _offset; }
776 const PTR ptr() const { return _ptr; }
777
778 static const TypePtr *make( TYPES t, PTR ptr, int offset );
779
780 // Return a 'ptr' version of this type
781 virtual const Type *cast_to_ptr_type(PTR ptr) const;
782
783 virtual intptr_t get_con() const;
784
785 int xadd_offset( intptr_t offset ) const;
786 virtual const TypePtr *add_offset( intptr_t offset ) const;
787
788 virtual bool singleton(void) const; // TRUE if type is a singleton
789 virtual bool empty(void) const; // TRUE if type is vacuous
790 virtual const Type *xmeet( const Type *t ) const;
791 int meet_offset( int offset ) const;
792 int dual_offset( ) const;
793 virtual const Type *xdual() const; // Compute dual right now.
794
795 // meet, dual and join over pointer equivalence sets
796 PTR meet_ptr( const PTR in_ptr ) const { return ptr_meet[in_ptr][ptr()]; }
797 PTR dual_ptr() const { return ptr_dual[ptr()]; }
798
799 // This is textually confusing unless one recalls that
800 // join(t) == dual()->meet(t->dual())->dual().
801 PTR join_ptr( const PTR in_ptr ) const {
802 return ptr_dual[ ptr_meet[ ptr_dual[in_ptr] ] [ dual_ptr() ] ];
803 }
804
805 // Tests for relation to centerline of type lattice:
806 static bool above_centerline(PTR ptr) { return (ptr <= AnyNull); }
807 static bool below_centerline(PTR ptr) { return (ptr >= NotNull); }
808 // Convenience common pre-built types.
809 static const TypePtr *NULL_PTR;
810 static const TypePtr *NOTNULL;
811 static const TypePtr *BOTTOM;
812 #ifndef PRODUCT
813 virtual void dump2( Dict &d, uint depth, outputStream *st ) const;
814 #endif
815 };
816
817 //------------------------------TypeRawPtr-------------------------------------
818 // Class of raw pointers, pointers to things other than Oops. Examples
819 // include the stack pointer, top of heap, card-marking area, handles, etc.
820 class TypeRawPtr : public TypePtr {
821 protected:
822 TypeRawPtr( PTR ptr, address bits ) : TypePtr(RawPtr,ptr,0), _bits(bits){}
823 public:
824 virtual bool eq( const Type *t ) const;
825 virtual int hash() const; // Type specific hashing
826
827 const address _bits; // Constant value, if applicable
828
829 static const TypeRawPtr *make( PTR ptr );
830 static const TypeRawPtr *make( address bits );
831
832 // Return a 'ptr' version of this type
833 virtual const Type *cast_to_ptr_type(PTR ptr) const;
834
835 virtual intptr_t get_con() const;
836
837 virtual const TypePtr *add_offset( intptr_t offset ) const;
838
839 virtual const Type *xmeet( const Type *t ) const;
840 virtual const Type *xdual() const; // Compute dual right now.
841 // Convenience common pre-built types.
842 static const TypeRawPtr *BOTTOM;
843 static const TypeRawPtr *NOTNULL;
844 #ifndef PRODUCT
845 virtual void dump2( Dict &d, uint depth, outputStream *st ) const;
846 #endif
847 };
848
849 //------------------------------TypeOopPtr-------------------------------------
850 // Some kind of oop (Java pointer), either klass or instance or array.
851 class TypeOopPtr : public TypePtr {
852 protected:
853 TypeOopPtr(TYPES t, PTR ptr, ciKlass* k, bool xk, ciObject* o, int offset, int instance_id, const TypeOopPtr* speculative, int inline_depth);
854 public:
855 virtual bool eq( const Type *t ) const;
856 virtual int hash() const; // Type specific hashing
857 virtual bool singleton(void) const; // TRUE if type is a singleton
858 enum {
859 InstanceTop = -1, // undefined instance
860 InstanceBot = 0 // any possible instance
861 };
862 protected:
863
864 enum {
865 InlineDepthBottom = INT_MAX,
866 InlineDepthTop = -InlineDepthBottom
867 };
868 // Oop is NULL, unless this is a constant oop.
869 ciObject* _const_oop; // Constant oop
870 // If _klass is NULL, then so is _sig. This is an unloaded klass.
871 ciKlass* _klass; // Klass object
872 // Does the type exclude subclasses of the klass? (Inexact == polymorphic.)
873 bool _klass_is_exact;
874 bool _is_ptr_to_narrowoop;
875 bool _is_ptr_to_narrowklass;
876 bool _is_ptr_to_boxed_value;
877
878 // If not InstanceTop or InstanceBot, indicates that this is
879 // a particular instance of this type which is distinct.
880 // This is the the node index of the allocation node creating this instance.
881 int _instance_id;
882
883 // Extra type information profiling gave us. We propagate it the
884 // same way the rest of the type info is propagated. If we want to
885 // use it, then we have to emit a guard: this part of the type is
886 // not something we know but something we speculate about the type.
887 const TypeOopPtr* _speculative;
888 // For speculative types, we record at what inlining depth the
889 // profiling point that provided the data is. We want to favor
890 // profile data coming from outer scopes which are likely better for
891 // the current compilation.
892 int _inline_depth;
893
894 static const TypeOopPtr* make_from_klass_common(ciKlass* klass, bool klass_change, bool try_for_exact);
895
896 int dual_instance_id() const;
897 int meet_instance_id(int uid) const;
898
899 // utility methods to work on the speculative part of the type
900 const TypeOopPtr* dual_speculative() const;
901 const TypeOopPtr* xmeet_speculative(const TypeOopPtr* other) const;
902 bool eq_speculative(const TypeOopPtr* other) const;
903 int hash_speculative() const;
904 const TypeOopPtr* add_offset_speculative(intptr_t offset) const;
905 #ifndef PRODUCT
906 void dump_speculative(outputStream *st) const;
907 #endif
908 // utility methods to work on the inline depth of the type
909 int dual_inline_depth() const;
910 int meet_inline_depth(int depth) const;
911 #ifndef PRODUCT
912 void dump_inline_depth(outputStream *st) const;
913 #endif
914
915 // Do not allow interface-vs.-noninterface joins to collapse to top.
916 virtual const Type *filter_helper(const Type *kills, bool include_speculative) const;
917
918 public:
919 // Creates a type given a klass. Correctly handles multi-dimensional arrays
920 // Respects UseUniqueSubclasses.
921 // If the klass is final, the resulting type will be exact.
922 static const TypeOopPtr* make_from_klass(ciKlass* klass) {
923 return make_from_klass_common(klass, true, false);
924 }
925 // Same as before, but will produce an exact type, even if
926 // the klass is not final, as long as it has exactly one implementation.
927 static const TypeOopPtr* make_from_klass_unique(ciKlass* klass) {
928 return make_from_klass_common(klass, true, true);
929 }
930 // Same as before, but does not respects UseUniqueSubclasses.
931 // Use this only for creating array element types.
932 static const TypeOopPtr* make_from_klass_raw(ciKlass* klass) {
933 return make_from_klass_common(klass, false, false);
934 }
935 // Creates a singleton type given an object.
936 // If the object cannot be rendered as a constant,
937 // may return a non-singleton type.
938 // If require_constant, produce a NULL if a singleton is not possible.
939 static const TypeOopPtr* make_from_constant(ciObject* o,
940 bool require_constant = false,
941 bool not_null_elements = false);
942
943 // Make a generic (unclassed) pointer to an oop.
944 static const TypeOopPtr* make(PTR ptr, int offset, int instance_id, const TypeOopPtr* speculative = NULL, int inline_depth = InlineDepthBottom);
945
946 ciObject* const_oop() const { return _const_oop; }
947 virtual ciKlass* klass() const { return _klass; }
948 bool klass_is_exact() const { return _klass_is_exact; }
949
950 // Returns true if this pointer points at memory which contains a
951 // compressed oop references.
952 bool is_ptr_to_narrowoop_nv() const { return _is_ptr_to_narrowoop; }
953 bool is_ptr_to_narrowklass_nv() const { return _is_ptr_to_narrowklass; }
954 bool is_ptr_to_boxed_value() const { return _is_ptr_to_boxed_value; }
955 bool is_known_instance() const { return _instance_id > 0; }
956 int instance_id() const { return _instance_id; }
957 bool is_known_instance_field() const { return is_known_instance() && _offset >= 0; }
958 virtual const TypeOopPtr* speculative() const { return _speculative; }
959
960 virtual intptr_t get_con() const;
961
962 virtual const Type *cast_to_ptr_type(PTR ptr) const;
963
964 virtual const Type *cast_to_exactness(bool klass_is_exact) const;
965
966 virtual const TypeOopPtr *cast_to_instance_id(int instance_id) const;
967
968 // corresponding pointer to klass, for a given instance
969 const TypeKlassPtr* as_klass_type() const;
970
971 virtual const TypePtr *add_offset( intptr_t offset ) const;
972 // Return same type without a speculative part
973 virtual const Type* remove_speculative() const;
974
975 virtual const Type *xmeet(const Type *t) const;
976 virtual const Type *xdual() const; // Compute dual right now.
977 // the core of the computation of the meet for TypeOopPtr and for its subclasses
978 virtual const Type *xmeet_helper(const Type *t) const;
979
980 // Convenience common pre-built type.
981 static const TypeOopPtr *BOTTOM;
982 #ifndef PRODUCT
983 virtual void dump2( Dict &d, uint depth, outputStream *st ) const;
984 #endif
985
986 // Return the speculative type if any
987 ciKlass* speculative_type() const {
988 if (_speculative != NULL) {
989 const TypeOopPtr* speculative = _speculative->join(this)->is_oopptr();
990 if (speculative->klass_is_exact()) {
991 return speculative->klass();
992 }
993 }
994 return NULL;
995 }
996 int inline_depth() const {
997 return _inline_depth;
998 }
999 virtual const TypeOopPtr* with_inline_depth(int depth) const;
1000 virtual bool would_improve_type(ciKlass* exact_kls, int inline_depth) const;
1001 };
1002
1003 //------------------------------TypeInstPtr------------------------------------
1004 // Class of Java object pointers, pointing either to non-array Java instances
1005 // or to a Klass* (including array klasses).
1006 class TypeInstPtr : public TypeOopPtr {
1007 TypeInstPtr(PTR ptr, ciKlass* k, bool xk, ciObject* o, int offset, int instance_id, const TypeOopPtr* speculative, int inline_depth);
1008 virtual bool eq( const Type *t ) const;
1009 virtual int hash() const; // Type specific hashing
1010
1011 ciSymbol* _name; // class name
1012
1013 public:
1014 ciSymbol* name() const { return _name; }
1015
1016 bool is_loaded() const { return _klass->is_loaded(); }
1017
1018 // Make a pointer to a constant oop.
1019 static const TypeInstPtr *make(ciObject* o) {
1020 return make(TypePtr::Constant, o->klass(), true, o, 0, InstanceBot);
1021 }
1022 // Make a pointer to a constant oop with offset.
1023 static const TypeInstPtr *make(ciObject* o, int offset) {
1024 return make(TypePtr::Constant, o->klass(), true, o, offset, InstanceBot);
1025 }
1026
1027 // Make a pointer to some value of type klass.
1028 static const TypeInstPtr *make(PTR ptr, ciKlass* klass) {
1029 return make(ptr, klass, false, NULL, 0, InstanceBot);
1030 }
1031
1032 // Make a pointer to some non-polymorphic value of exactly type klass.
1033 static const TypeInstPtr *make_exact(PTR ptr, ciKlass* klass) {
1034 return make(ptr, klass, true, NULL, 0, InstanceBot);
1035 }
1036
1037 // Make a pointer to some value of type klass with offset.
1038 static const TypeInstPtr *make(PTR ptr, ciKlass* klass, int offset) {
1039 return make(ptr, klass, false, NULL, offset, InstanceBot);
1040 }
1041
1042 // Make a pointer to an oop.
1043 static const TypeInstPtr *make(PTR ptr, ciKlass* k, bool xk, ciObject* o, int offset, int instance_id = InstanceBot, const TypeOopPtr* speculative = NULL, int inline_depth = InlineDepthBottom);
1044
1045 /** Create constant type for a constant boxed value */
1046 const Type* get_const_boxed_value() const;
1047
1048 // If this is a java.lang.Class constant, return the type for it or NULL.
1049 // Pass to Type::get_const_type to turn it to a type, which will usually
1050 // be a TypeInstPtr, but may also be a TypeInt::INT for int.class, etc.
1051 ciType* java_mirror_type() const;
1052
1053 virtual const Type *cast_to_ptr_type(PTR ptr) const;
1054
1055 virtual const Type *cast_to_exactness(bool klass_is_exact) const;
1056
1057 virtual const TypeOopPtr *cast_to_instance_id(int instance_id) const;
1058
1059 virtual const TypePtr *add_offset( intptr_t offset ) const;
1060 // Return same type without a speculative part
1061 virtual const Type* remove_speculative() const;
1062 virtual const TypeOopPtr* with_inline_depth(int depth) const;
1063
1064 // the core of the computation of the meet of 2 types
1065 virtual const Type *xmeet_helper(const Type *t) const;
1066 virtual const TypeInstPtr *xmeet_unloaded( const TypeInstPtr *t ) const;
1067 virtual const Type *xdual() const; // Compute dual right now.
1068
1069 // Convenience common pre-built types.
1070 static const TypeInstPtr *NOTNULL;
1071 static const TypeInstPtr *BOTTOM;
1072 static const TypeInstPtr *MIRROR;
1073 static const TypeInstPtr *MARK;
1074 static const TypeInstPtr *KLASS;
1075 #ifndef PRODUCT
1076 virtual void dump2( Dict &d, uint depth, outputStream *st ) const; // Specialized per-Type dumping
1077 #endif
1078 };
1079
1080 //------------------------------TypeAryPtr-------------------------------------
1081 // Class of Java array pointers
1082 class TypeAryPtr : public TypeOopPtr {
1083 TypeAryPtr( PTR ptr, ciObject* o, const TypeAry *ary, ciKlass* k, bool xk,
1084 int offset, int instance_id, bool is_autobox_cache, const TypeOopPtr* speculative, int inline_depth)
1085 : TypeOopPtr(AryPtr,ptr,k,xk,o,offset, instance_id, speculative, inline_depth),
1086 _ary(ary),
1087 _is_autobox_cache(is_autobox_cache)
1088 {
1089 #ifdef ASSERT
1090 if (k != NULL) {
1091 // Verify that specified klass and TypeAryPtr::klass() follow the same rules.
1092 ciKlass* ck = compute_klass(true);
1093 if (k != ck) {
1094 this->dump(); tty->cr();
1095 tty->print(" k: ");
1096 k->print(); tty->cr();
1097 tty->print("ck: ");
1098 if (ck != NULL) ck->print();
1099 else tty->print("<NULL>");
1100 tty->cr();
1101 assert(false, "unexpected TypeAryPtr::_klass");
1102 }
1103 }
1104 #endif
1105 }
1106 virtual bool eq( const Type *t ) const;
1107 virtual int hash() const; // Type specific hashing
1108 const TypeAry *_ary; // Array we point into
1109 const bool _is_autobox_cache;
1110
1111 ciKlass* compute_klass(DEBUG_ONLY(bool verify = false)) const;
1112
1113 public:
1114 // Accessors
1115 ciKlass* klass() const;
1116 const TypeAry* ary() const { return _ary; }
1117 const Type* elem() const { return _ary->_elem; }
1118 const TypeInt* size() const { return _ary->_size; }
1119 bool is_stable() const { return _ary->_stable; }
1120
1121 bool is_autobox_cache() const { return _is_autobox_cache; }
1122
1123 static const TypeAryPtr *make( PTR ptr, const TypeAry *ary, ciKlass* k, bool xk, int offset, int instance_id = InstanceBot, const TypeOopPtr* speculative = NULL, int inline_depth = InlineDepthBottom);
1124 // Constant pointer to array
1125 static const TypeAryPtr *make( PTR ptr, ciObject* o, const TypeAry *ary, ciKlass* k, bool xk, int offset, int instance_id = InstanceBot, const TypeOopPtr* speculative = NULL, int inline_depth = InlineDepthBottom, bool is_autobox_cache= false);
1126
1127 // Return a 'ptr' version of this type
1128 virtual const Type *cast_to_ptr_type(PTR ptr) const;
1129
1130 virtual const Type *cast_to_exactness(bool klass_is_exact) const;
1131
1132 virtual const TypeOopPtr *cast_to_instance_id(int instance_id) const;
1133
1134 virtual const TypeAryPtr* cast_to_size(const TypeInt* size) const;
1135 virtual const TypeInt* narrow_size_type(const TypeInt* size) const;
1136
1137 virtual bool empty(void) const; // TRUE if type is vacuous
1138 virtual const TypePtr *add_offset( intptr_t offset ) const;
1139 // Return same type without a speculative part
1140 virtual const Type* remove_speculative() const;
1141 virtual const TypeOopPtr* with_inline_depth(int depth) const;
1142
1143 // the core of the computation of the meet of 2 types
1144 virtual const Type *xmeet_helper(const Type *t) const;
1145 virtual const Type *xdual() const; // Compute dual right now.
1146
1147 const TypeAryPtr* cast_to_stable(bool stable, int stable_dimension = 1) const;
1148 int stable_dimension() const;
1149
1150 // Convenience common pre-built types.
1151 static const TypeAryPtr *RANGE;
1152 static const TypeAryPtr *OOPS;
1153 static const TypeAryPtr *NARROWOOPS;
1154 static const TypeAryPtr *BYTES;
1155 static const TypeAryPtr *SHORTS;
1156 static const TypeAryPtr *CHARS;
1157 static const TypeAryPtr *INTS;
1158 static const TypeAryPtr *LONGS;
1159 static const TypeAryPtr *FLOATS;
1160 static const TypeAryPtr *DOUBLES;
1161 // selects one of the above:
1162 static const TypeAryPtr *get_array_body_type(BasicType elem) {
1163 assert((uint)elem <= T_CONFLICT && _array_body_type[elem] != NULL, "bad elem type");
1164 return _array_body_type[elem];
1165 }
1166 static const TypeAryPtr *_array_body_type[T_CONFLICT+1];
1167 // sharpen the type of an int which is used as an array size
1168 #ifdef ASSERT
1169 // One type is interface, the other is oop
1170 virtual bool interface_vs_oop(const Type *t) const;
1171 #endif
1172 #ifndef PRODUCT
1173 virtual void dump2( Dict &d, uint depth, outputStream *st ) const; // Specialized per-Type dumping
1174 #endif
1175 };
1176
1177 //------------------------------TypeMetadataPtr-------------------------------------
1178 // Some kind of metadata, either Method*, MethodData* or CPCacheOop
1179 class TypeMetadataPtr : public TypePtr {
1180 protected:
1181 TypeMetadataPtr(PTR ptr, ciMetadata* metadata, int offset);
1182 // Do not allow interface-vs.-noninterface joins to collapse to top.
1183 virtual const Type *filter_helper(const Type *kills, bool include_speculative) const;
1184 public:
1185 virtual bool eq( const Type *t ) const;
1186 virtual int hash() const; // Type specific hashing
1187 virtual bool singleton(void) const; // TRUE if type is a singleton
1188
1189 private:
1190 ciMetadata* _metadata;
1191
1192 public:
1193 static const TypeMetadataPtr* make(PTR ptr, ciMetadata* m, int offset);
1194
1195 static const TypeMetadataPtr* make(ciMethod* m);
1196 static const TypeMetadataPtr* make(ciMethodData* m);
1197
1198 ciMetadata* metadata() const { return _metadata; }
1199
1200 virtual const Type *cast_to_ptr_type(PTR ptr) const;
1201
1202 virtual const TypePtr *add_offset( intptr_t offset ) const;
1203
1204 virtual const Type *xmeet( const Type *t ) const;
1205 virtual const Type *xdual() const; // Compute dual right now.
1206
1207 virtual intptr_t get_con() const;
1208
1209 // Convenience common pre-built types.
1210 static const TypeMetadataPtr *BOTTOM;
1211
1212 #ifndef PRODUCT
1213 virtual void dump2( Dict &d, uint depth, outputStream *st ) const;
1214 #endif
1215 };
1216
1217 //------------------------------TypeKlassPtr-----------------------------------
1218 // Class of Java Klass pointers
1219 class TypeKlassPtr : public TypePtr {
1220 TypeKlassPtr( PTR ptr, ciKlass* klass, int offset );
1221
1222 protected:
1223 virtual const Type *filter_helper(const Type *kills, bool include_speculative) const;
1224 public:
1225 virtual bool eq( const Type *t ) const;
1226 virtual int hash() const; // Type specific hashing
1227 virtual bool singleton(void) const; // TRUE if type is a singleton
1228 private:
1229
1230 static const TypeKlassPtr* make_from_klass_common(ciKlass* klass, bool klass_change, bool try_for_exact);
1231
1232 ciKlass* _klass;
1233
1234 // Does the type exclude subclasses of the klass? (Inexact == polymorphic.)
1235 bool _klass_is_exact;
1236
1237 public:
1238 ciSymbol* name() const { return klass()->name(); }
1239
1240 ciKlass* klass() const { return _klass; }
1241 bool klass_is_exact() const { return _klass_is_exact; }
1242
1243 bool is_loaded() const { return klass()->is_loaded(); }
1244
1245 // Creates a type given a klass. Correctly handles multi-dimensional arrays
1246 // Respects UseUniqueSubclasses.
1247 // If the klass is final, the resulting type will be exact.
1248 static const TypeKlassPtr* make_from_klass(ciKlass* klass) {
1249 return make_from_klass_common(klass, true, false);
1250 }
1251 // Same as before, but will produce an exact type, even if
1252 // the klass is not final, as long as it has exactly one implementation.
1253 static const TypeKlassPtr* make_from_klass_unique(ciKlass* klass) {
1254 return make_from_klass_common(klass, true, true);
1255 }
1256 // Same as before, but does not respects UseUniqueSubclasses.
1257 // Use this only for creating array element types.
1258 static const TypeKlassPtr* make_from_klass_raw(ciKlass* klass) {
1259 return make_from_klass_common(klass, false, false);
1260 }
1261
1262 // Make a generic (unclassed) pointer to metadata.
1263 static const TypeKlassPtr* make(PTR ptr, int offset);
1264
1265 // ptr to klass 'k'
1266 static const TypeKlassPtr *make( ciKlass* k ) { return make( TypePtr::Constant, k, 0); }
1267 // ptr to klass 'k' with offset
1268 static const TypeKlassPtr *make( ciKlass* k, int offset ) { return make( TypePtr::Constant, k, offset); }
1269 // ptr to klass 'k' or sub-klass
1270 static const TypeKlassPtr *make( PTR ptr, ciKlass* k, int offset);
1271
1272 virtual const Type *cast_to_ptr_type(PTR ptr) const;
1273
1274 virtual const Type *cast_to_exactness(bool klass_is_exact) const;
1275
1276 // corresponding pointer to instance, for a given class
1277 const TypeOopPtr* as_instance_type() const;
1278
1279 virtual const TypePtr *add_offset( intptr_t offset ) const;
1280 virtual const Type *xmeet( const Type *t ) const;
1281 virtual const Type *xdual() const; // Compute dual right now.
1282
1283 virtual intptr_t get_con() const;
1284
1285 // Convenience common pre-built types.
1286 static const TypeKlassPtr* OBJECT; // Not-null object klass or below
1287 static const TypeKlassPtr* OBJECT_OR_NULL; // Maybe-null version of same
1288 #ifndef PRODUCT
1289 virtual void dump2( Dict &d, uint depth, outputStream *st ) const; // Specialized per-Type dumping
1290 #endif
1291 };
1292
1293 class TypeNarrowPtr : public Type {
1294 protected:
1295 const TypePtr* _ptrtype; // Could be TypePtr::NULL_PTR
1296
1297 TypeNarrowPtr(TYPES t, const TypePtr* ptrtype): _ptrtype(ptrtype),
1298 Type(t) {
1299 assert(ptrtype->offset() == 0 ||
1300 ptrtype->offset() == OffsetBot ||
1301 ptrtype->offset() == OffsetTop, "no real offsets");
1302 }
1303
1304 virtual const TypeNarrowPtr *isa_same_narrowptr(const Type *t) const = 0;
1305 virtual const TypeNarrowPtr *is_same_narrowptr(const Type *t) const = 0;
1306 virtual const TypeNarrowPtr *make_same_narrowptr(const TypePtr *t) const = 0;
1307 virtual const TypeNarrowPtr *make_hash_same_narrowptr(const TypePtr *t) const = 0;
1308 // Do not allow interface-vs.-noninterface joins to collapse to top.
1309 virtual const Type *filter_helper(const Type *kills, bool include_speculative) const;
1310 public:
1311 virtual bool eq( const Type *t ) const;
1312 virtual int hash() const; // Type specific hashing
1313 virtual bool singleton(void) const; // TRUE if type is a singleton
1314
1315 virtual const Type *xmeet( const Type *t ) const;
1316 virtual const Type *xdual() const; // Compute dual right now.
1317
1318 virtual intptr_t get_con() const;
1319
1320 virtual bool empty(void) const; // TRUE if type is vacuous
1321
1322 // returns the equivalent ptr type for this compressed pointer
1323 const TypePtr *get_ptrtype() const {
1324 return _ptrtype;
1325 }
1326
1327 #ifndef PRODUCT
1328 virtual void dump2( Dict &d, uint depth, outputStream *st ) const;
1329 #endif
1330 };
1331
1332 //------------------------------TypeNarrowOop----------------------------------
1333 // A compressed reference to some kind of Oop. This type wraps around
1334 // a preexisting TypeOopPtr and forwards most of it's operations to
1335 // the underlying type. It's only real purpose is to track the
1336 // oopness of the compressed oop value when we expose the conversion
1337 // between the normal and the compressed form.
1338 class TypeNarrowOop : public TypeNarrowPtr {
1339 protected:
1340 TypeNarrowOop( const TypePtr* ptrtype): TypeNarrowPtr(NarrowOop, ptrtype) {
1341 }
1342
1343 virtual const TypeNarrowPtr *isa_same_narrowptr(const Type *t) const {
1344 return t->isa_narrowoop();
1345 }
1346
1347 virtual const TypeNarrowPtr *is_same_narrowptr(const Type *t) const {
1348 return t->is_narrowoop();
1349 }
1350
1351 virtual const TypeNarrowPtr *make_same_narrowptr(const TypePtr *t) const {
1352 return new TypeNarrowOop(t);
1353 }
1354
1355 virtual const TypeNarrowPtr *make_hash_same_narrowptr(const TypePtr *t) const {
1356 return (const TypeNarrowPtr*)((new TypeNarrowOop(t))->hashcons());
1357 }
1358
1359 public:
1360
1361 static const TypeNarrowOop *make( const TypePtr* type);
1362
1363 static const TypeNarrowOop* make_from_constant(ciObject* con, bool require_constant = false) {
1364 return make(TypeOopPtr::make_from_constant(con, require_constant));
1365 }
1366
1367 static const TypeNarrowOop *BOTTOM;
1368 static const TypeNarrowOop *NULL_PTR;
1369
1370 virtual const Type* remove_speculative() const {
1371 return make(_ptrtype->remove_speculative()->is_ptr());
1372 }
1373
1374 #ifndef PRODUCT
1375 virtual void dump2( Dict &d, uint depth, outputStream *st ) const;
1376 #endif
1377 };
1378
1379 //------------------------------TypeNarrowKlass----------------------------------
1380 // A compressed reference to klass pointer. This type wraps around a
1381 // preexisting TypeKlassPtr and forwards most of it's operations to
1382 // the underlying type.
1383 class TypeNarrowKlass : public TypeNarrowPtr {
1384 protected:
1385 TypeNarrowKlass( const TypePtr* ptrtype): TypeNarrowPtr(NarrowKlass, ptrtype) {
1386 }
1387
1388 virtual const TypeNarrowPtr *isa_same_narrowptr(const Type *t) const {
1389 return t->isa_narrowklass();
1390 }
1391
1392 virtual const TypeNarrowPtr *is_same_narrowptr(const Type *t) const {
1393 return t->is_narrowklass();
1394 }
1395
1396 virtual const TypeNarrowPtr *make_same_narrowptr(const TypePtr *t) const {
1397 return new TypeNarrowKlass(t);
1398 }
1399
1400 virtual const TypeNarrowPtr *make_hash_same_narrowptr(const TypePtr *t) const {
1401 return (const TypeNarrowPtr*)((new TypeNarrowKlass(t))->hashcons());
1402 }
1403
1404 public:
1405 static const TypeNarrowKlass *make( const TypePtr* type);
1406
1407 // static const TypeNarrowKlass *BOTTOM;
1408 static const TypeNarrowKlass *NULL_PTR;
1409
1410 #ifndef PRODUCT
1411 virtual void dump2( Dict &d, uint depth, outputStream *st ) const;
1412 #endif
1413 };
1414
1415 //------------------------------TypeFunc---------------------------------------
1416 // Class of Array Types
1417 class TypeFunc : public Type {
1418 TypeFunc( const TypeTuple *domain, const TypeTuple *range ) : Type(Function), _domain(domain), _range(range) {}
1419 virtual bool eq( const Type *t ) const;
1420 virtual int hash() const; // Type specific hashing
1421 virtual bool singleton(void) const; // TRUE if type is a singleton
1422 virtual bool empty(void) const; // TRUE if type is vacuous
1423 public:
1424 // Constants are shared among ADLC and VM
1425 enum { Control = AdlcVMDeps::Control,
1426 I_O = AdlcVMDeps::I_O,
1427 Memory = AdlcVMDeps::Memory,
1428 FramePtr = AdlcVMDeps::FramePtr,
1429 ReturnAdr = AdlcVMDeps::ReturnAdr,
1430 Parms = AdlcVMDeps::Parms
1431 };
1432
1433 const TypeTuple* const _domain; // Domain of inputs
1434 const TypeTuple* const _range; // Range of results
1435
1436 // Accessors:
1437 const TypeTuple* domain() const { return _domain; }
1438 const TypeTuple* range() const { return _range; }
1439
1440 static const TypeFunc *make(ciMethod* method);
1441 static const TypeFunc *make(ciSignature signature, const Type* extra);
1442 static const TypeFunc *make(const TypeTuple* domain, const TypeTuple* range);
1443
1444 virtual const Type *xmeet( const Type *t ) const;
1445 virtual const Type *xdual() const; // Compute dual right now.
1446
1447 BasicType return_type() const;
1448
1449 #ifndef PRODUCT
1450 virtual void dump2( Dict &d, uint depth, outputStream *st ) const; // Specialized per-Type dumping
1451 #endif
1452 // Convenience common pre-built types.
1453 };
1454
1455 //------------------------------accessors--------------------------------------
1456 inline bool Type::is_ptr_to_narrowoop() const {
1457 #ifdef _LP64
1458 return (isa_oopptr() != NULL && is_oopptr()->is_ptr_to_narrowoop_nv());
1459 #else
1460 return false;
1461 #endif
1462 }
1463
1464 inline bool Type::is_ptr_to_narrowklass() const {
1465 #ifdef _LP64
1466 return (isa_oopptr() != NULL && is_oopptr()->is_ptr_to_narrowklass_nv());
1467 #else
1468 return false;
1469 #endif
1470 }
1471
1472 inline float Type::getf() const {
1473 assert( _base == FloatCon, "Not a FloatCon" );
1474 return ((TypeF*)this)->_f;
1475 }
1476
1477 inline double Type::getd() const {
1478 assert( _base == DoubleCon, "Not a DoubleCon" );
1479 return ((TypeD*)this)->_d;
1480 }
1481
1482 inline const TypeInt *Type::is_int() const {
1483 assert( _base == Int, "Not an Int" );
1484 return (TypeInt*)this;
1485 }
1486
1487 inline const TypeInt *Type::isa_int() const {
1488 return ( _base == Int ? (TypeInt*)this : NULL);
1489 }
1490
1491 inline const TypeLong *Type::is_long() const {
1492 assert( _base == Long, "Not a Long" );
1493 return (TypeLong*)this;
1494 }
1495
1496 inline const TypeLong *Type::isa_long() const {
1497 return ( _base == Long ? (TypeLong*)this : NULL);
1498 }
1499
1500 inline const TypeF *Type::isa_float() const {
1501 return ((_base == FloatTop ||
1502 _base == FloatCon ||
1503 _base == FloatBot) ? (TypeF*)this : NULL);
1504 }
1505
1506 inline const TypeF *Type::is_float_constant() const {
1507 assert( _base == FloatCon, "Not a Float" );
1508 return (TypeF*)this;
1509 }
1510
1511 inline const TypeF *Type::isa_float_constant() const {
1512 return ( _base == FloatCon ? (TypeF*)this : NULL);
1513 }
1514
1515 inline const TypeD *Type::isa_double() const {
1516 return ((_base == DoubleTop ||
1517 _base == DoubleCon ||
1518 _base == DoubleBot) ? (TypeD*)this : NULL);
1519 }
1520
1521 inline const TypeD *Type::is_double_constant() const {
1522 assert( _base == DoubleCon, "Not a Double" );
1523 return (TypeD*)this;
1524 }
1525
1526 inline const TypeD *Type::isa_double_constant() const {
1527 return ( _base == DoubleCon ? (TypeD*)this : NULL);
1528 }
1529
1530 inline const TypeTuple *Type::is_tuple() const {
1531 assert( _base == Tuple, "Not a Tuple" );
1532 return (TypeTuple*)this;
1533 }
1534
1535 inline const TypeAry *Type::is_ary() const {
1536 assert( _base == Array , "Not an Array" );
1537 return (TypeAry*)this;
1538 }
1539
1540 inline const TypeVect *Type::is_vect() const {
1541 assert( _base >= VectorS && _base <= VectorY, "Not a Vector" );
1542 return (TypeVect*)this;
1543 }
1544
1545 inline const TypeVect *Type::isa_vect() const {
1546 return (_base >= VectorS && _base <= VectorY) ? (TypeVect*)this : NULL;
1547 }
1548
1549 inline const TypePtr *Type::is_ptr() const {
1550 // AnyPtr is the first Ptr and KlassPtr the last, with no non-ptrs between.
1551 assert(_base >= AnyPtr && _base <= KlassPtr, "Not a pointer");
1552 return (TypePtr*)this;
1553 }
1554
1555 inline const TypePtr *Type::isa_ptr() const {
1556 // AnyPtr is the first Ptr and KlassPtr the last, with no non-ptrs between.
1557 return (_base >= AnyPtr && _base <= KlassPtr) ? (TypePtr*)this : NULL;
1558 }
1559
1560 inline const TypeOopPtr *Type::is_oopptr() const {
1561 // OopPtr is the first and KlassPtr the last, with no non-oops between.
1562 assert(_base >= OopPtr && _base <= AryPtr, "Not a Java pointer" ) ;
1563 return (TypeOopPtr*)this;
1564 }
1565
1566 inline const TypeOopPtr *Type::isa_oopptr() const {
1567 // OopPtr is the first and KlassPtr the last, with no non-oops between.
1568 return (_base >= OopPtr && _base <= AryPtr) ? (TypeOopPtr*)this : NULL;
1569 }
1570
1571 inline const TypeRawPtr *Type::isa_rawptr() const {
1572 return (_base == RawPtr) ? (TypeRawPtr*)this : NULL;
1573 }
1574
1575 inline const TypeRawPtr *Type::is_rawptr() const {
1576 assert( _base == RawPtr, "Not a raw pointer" );
1577 return (TypeRawPtr*)this;
1578 }
1579
1580 inline const TypeInstPtr *Type::isa_instptr() const {
1581 return (_base == InstPtr) ? (TypeInstPtr*)this : NULL;
1582 }
1583
1584 inline const TypeInstPtr *Type::is_instptr() const {
1585 assert( _base == InstPtr, "Not an object pointer" );
1586 return (TypeInstPtr*)this;
1587 }
1588
1589 inline const TypeAryPtr *Type::isa_aryptr() const {
1590 return (_base == AryPtr) ? (TypeAryPtr*)this : NULL;
1591 }
1592
1593 inline const TypeAryPtr *Type::is_aryptr() const {
1594 assert( _base == AryPtr, "Not an array pointer" );
1595 return (TypeAryPtr*)this;
1596 }
1597
1598 inline const TypeNarrowOop *Type::is_narrowoop() const {
1599 // OopPtr is the first and KlassPtr the last, with no non-oops between.
1600 assert(_base == NarrowOop, "Not a narrow oop" ) ;
1601 return (TypeNarrowOop*)this;
1602 }
1603
1604 inline const TypeNarrowOop *Type::isa_narrowoop() const {
1605 // OopPtr is the first and KlassPtr the last, with no non-oops between.
1606 return (_base == NarrowOop) ? (TypeNarrowOop*)this : NULL;
1607 }
1608
1609 inline const TypeNarrowKlass *Type::is_narrowklass() const {
1610 assert(_base == NarrowKlass, "Not a narrow oop" ) ;
1611 return (TypeNarrowKlass*)this;
1612 }
1613
1614 inline const TypeNarrowKlass *Type::isa_narrowklass() const {
1615 return (_base == NarrowKlass) ? (TypeNarrowKlass*)this : NULL;
1616 }
1617
1618 inline const TypeMetadataPtr *Type::is_metadataptr() const {
1619 // MetadataPtr is the first and CPCachePtr the last
1620 assert(_base == MetadataPtr, "Not a metadata pointer" ) ;
1621 return (TypeMetadataPtr*)this;
1622 }
1623
1624 inline const TypeMetadataPtr *Type::isa_metadataptr() const {
1625 return (_base == MetadataPtr) ? (TypeMetadataPtr*)this : NULL;
1626 }
1627
1628 inline const TypeKlassPtr *Type::isa_klassptr() const {
1629 return (_base == KlassPtr) ? (TypeKlassPtr*)this : NULL;
1630 }
1631
1632 inline const TypeKlassPtr *Type::is_klassptr() const {
1633 assert( _base == KlassPtr, "Not a klass pointer" );
1634 return (TypeKlassPtr*)this;
1635 }
1636
1637 inline const TypePtr* Type::make_ptr() const {
1638 return (_base == NarrowOop) ? is_narrowoop()->get_ptrtype() :
1639 ((_base == NarrowKlass) ? is_narrowklass()->get_ptrtype() :
1640 (isa_ptr() ? is_ptr() : NULL));
1641 }
1642
1643 inline const TypeOopPtr* Type::make_oopptr() const {
1644 return (_base == NarrowOop) ? is_narrowoop()->get_ptrtype()->is_oopptr() : is_oopptr();
1645 }
1646
1647 inline const TypeNarrowOop* Type::make_narrowoop() const {
1648 return (_base == NarrowOop) ? is_narrowoop() :
1649 (isa_ptr() ? TypeNarrowOop::make(is_ptr()) : NULL);
1650 }
1651
1652 inline const TypeNarrowKlass* Type::make_narrowklass() const {
1653 return (_base == NarrowKlass) ? is_narrowklass() :
1654 (isa_ptr() ? TypeNarrowKlass::make(is_ptr()) : NULL);
1655 }
1656
1657 inline bool Type::is_floatingpoint() const {
1658 if( (_base == FloatCon) || (_base == FloatBot) ||
1659 (_base == DoubleCon) || (_base == DoubleBot) )
1660 return true;
1661 return false;
1662 }
1663
1664 inline bool Type::is_ptr_to_boxing_obj() const {
1665 const TypeInstPtr* tp = isa_instptr();
1666 return (tp != NULL) && (tp->offset() == 0) &&
1667 tp->klass()->is_instance_klass() &&
1668 tp->klass()->as_instance_klass()->is_box_klass();
1669 }
1670
1671
1672 // ===============================================================
1673 // Things that need to be 64-bits in the 64-bit build but
1674 // 32-bits in the 32-bit build. Done this way to get full
1675 // optimization AND strong typing.
1676 #ifdef _LP64
1677
1678 // For type queries and asserts
1679 #define is_intptr_t is_long
1680 #define isa_intptr_t isa_long
1681 #define find_intptr_t_type find_long_type
1682 #define find_intptr_t_con find_long_con
1683 #define TypeX TypeLong
1684 #define Type_X Type::Long
1685 #define TypeX_X TypeLong::LONG
1686 #define TypeX_ZERO TypeLong::ZERO
1687 // For 'ideal_reg' machine registers
1688 #define Op_RegX Op_RegL
1689 // For phase->intcon variants
1690 #define MakeConX longcon
1691 #define ConXNode ConLNode
1692 // For array index arithmetic
1693 #define MulXNode MulLNode
1694 #define AndXNode AndLNode
1695 #define OrXNode OrLNode
1696 #define CmpXNode CmpLNode
1697 #define SubXNode SubLNode
1698 #define LShiftXNode LShiftLNode
1699 // For object size computation:
1700 #define AddXNode AddLNode
1701 #define RShiftXNode RShiftLNode
1702 // For card marks and hashcodes
1703 #define URShiftXNode URShiftLNode
1704 // UseOptoBiasInlining
1705 #define XorXNode XorLNode
1706 #define StoreXConditionalNode StoreLConditionalNode
1707 // Opcodes
1708 #define Op_LShiftX Op_LShiftL
1709 #define Op_AndX Op_AndL
1710 #define Op_AddX Op_AddL
1711 #define Op_SubX Op_SubL
1712 #define Op_XorX Op_XorL
1713 #define Op_URShiftX Op_URShiftL
1714 // conversions
1715 #define ConvI2X(x) ConvI2L(x)
1716 #define ConvL2X(x) (x)
1717 #define ConvX2I(x) ConvL2I(x)
1718 #define ConvX2L(x) (x)
1719
1720 #else
1721
1722 // For type queries and asserts
1723 #define is_intptr_t is_int
1724 #define isa_intptr_t isa_int
1725 #define find_intptr_t_type find_int_type
1726 #define find_intptr_t_con find_int_con
1727 #define TypeX TypeInt
1728 #define Type_X Type::Int
1729 #define TypeX_X TypeInt::INT
1730 #define TypeX_ZERO TypeInt::ZERO
1731 // For 'ideal_reg' machine registers
1732 #define Op_RegX Op_RegI
1733 // For phase->intcon variants
1734 #define MakeConX intcon
1735 #define ConXNode ConINode
1736 // For array index arithmetic
1737 #define MulXNode MulINode
1738 #define AndXNode AndINode
1739 #define OrXNode OrINode
1740 #define CmpXNode CmpINode
1741 #define SubXNode SubINode
1742 #define LShiftXNode LShiftINode
1743 // For object size computation:
1744 #define AddXNode AddINode
1745 #define RShiftXNode RShiftINode
1746 // For card marks and hashcodes
1747 #define URShiftXNode URShiftINode
1748 // UseOptoBiasInlining
1749 #define XorXNode XorINode
1750 #define StoreXConditionalNode StoreIConditionalNode
1751 // Opcodes
1752 #define Op_LShiftX Op_LShiftI
1753 #define Op_AndX Op_AndI
1754 #define Op_AddX Op_AddI
1755 #define Op_SubX Op_SubI
1756 #define Op_XorX Op_XorI
1757 #define Op_URShiftX Op_URShiftI
1758 // conversions
1759 #define ConvI2X(x) (x)
1760 #define ConvL2X(x) ConvL2I(x)
1761 #define ConvX2I(x) (x)
1762 #define ConvX2L(x) ConvI2L(x)
1763
1764 #endif
1765
1766 #endif // SHARE_VM_OPTO_TYPE_HPP