1 /*
2 * Copyright (c) 1997, 2012, 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 #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 protected:
163 // Each class of type is also identified by its base.
164 const TYPES _base; // Enum of Types type
165
166 Type( TYPES t ) : _dual(NULL), _base(t) {} // Simple types
167 // ~Type(); // Use fast deallocation
168 const Type *hashcons(); // Hash-cons the type
169
170 public:
171
172 inline void* operator new( size_t x ) {
173 Compile* compile = Compile::current();
174 compile->set_type_last_size(x);
175 void *temp = compile->type_arena()->Amalloc_D(x);
176 compile->set_type_hwm(temp);
177 return temp;
178 }
179 inline void operator delete( void* ptr ) {
180 Compile* compile = Compile::current();
181 compile->type_arena()->Afree(ptr,compile->type_last_size());
182 }
183
184 // Initialize the type system for a particular compilation.
185 static void Initialize(Compile* compile);
186
187 // Initialize the types shared by all compilations.
188 static void Initialize_shared(Compile* compile);
189
190 TYPES base() const {
191 assert(_base > Bad && _base < lastype, "sanity");
192 return _base;
193 }
194
195 // Create a new hash-consd type
196 static const Type *make(enum TYPES);
197 // Test for equivalence of types
198 static int cmp( const Type *const t1, const Type *const t2 );
199 // Test for higher or equal in lattice
200 int higher_equal( const Type *t ) const { return !cmp(meet(t),t); }
201
202 // MEET operation; lower in lattice.
203 const Type *meet( const Type *t ) const;
204 // WIDEN: 'widens' for Ints and other range types
205 virtual const Type *widen( const Type *old, const Type* limit ) const { return this; }
206 // NARROW: complement for widen, used by pessimistic phases
207 virtual const Type *narrow( const Type *old ) const { return this; }
208
209 // DUAL operation: reflect around lattice centerline. Used instead of
210 // join to ensure my lattice is symmetric up and down.
211 const Type *dual() const { return _dual; }
212
213 // Compute meet dependent on base type
214 virtual const Type *xmeet( const Type *t ) const;
215 virtual const Type *xdual() const; // Compute dual right now.
216
217 // JOIN operation; higher in lattice. Done by finding the dual of the
218 // meet of the dual of the 2 inputs.
219 const Type *join( const Type *t ) const {
220 return dual()->meet(t->dual())->dual(); }
221
222 // Modified version of JOIN adapted to the needs Node::Value.
223 // Normalizes all empty values to TOP. Does not kill _widen bits.
224 // Currently, it also works around limitations involving interface types.
225 virtual const Type *filter( const Type *kills ) const;
226
227 #ifdef ASSERT
228 // One type is interface, the other is oop
229 virtual bool interface_vs_oop(const Type *t) const;
230 #endif
231
232 // Returns true if this pointer points at memory which contains a
233 // compressed oop references.
234 bool is_ptr_to_narrowoop() const;
235 bool is_ptr_to_narrowklass() const;
236
237 bool is_ptr_to_boxing_obj() const;
238
239
240 // Convenience access
241 float getf() const;
242 double getd() const;
243
244 const TypeInt *is_int() const;
245 const TypeInt *isa_int() const; // Returns NULL if not an Int
246 const TypeLong *is_long() const;
247 const TypeLong *isa_long() const; // Returns NULL if not a Long
248 const TypeD *isa_double() const; // Returns NULL if not a Double{Top,Con,Bot}
249 const TypeD *is_double_constant() const; // Asserts it is a DoubleCon
250 const TypeD *isa_double_constant() const; // Returns NULL if not a DoubleCon
251 const TypeF *isa_float() const; // Returns NULL if not a Float{Top,Con,Bot}
252 const TypeF *is_float_constant() const; // Asserts it is a FloatCon
253 const TypeF *isa_float_constant() const; // Returns NULL if not a FloatCon
254 const TypeTuple *is_tuple() const; // Collection of fields, NOT a pointer
255 const TypeAry *is_ary() const; // Array, NOT array pointer
256 const TypeVect *is_vect() const; // Vector
257 const TypeVect *isa_vect() const; // Returns NULL if not a Vector
258 const TypePtr *is_ptr() const; // Asserts it is a ptr type
259 const TypePtr *isa_ptr() const; // Returns NULL if not ptr type
260 const TypeRawPtr *isa_rawptr() const; // NOT Java oop
261 const TypeRawPtr *is_rawptr() const; // Asserts is rawptr
262 const TypeNarrowOop *is_narrowoop() const; // Java-style GC'd pointer
263 const TypeNarrowOop *isa_narrowoop() const; // Returns NULL if not oop ptr type
264 const TypeNarrowKlass *is_narrowklass() const; // compressed klass pointer
265 const TypeNarrowKlass *isa_narrowklass() const;// Returns NULL if not oop ptr type
266 const TypeOopPtr *isa_oopptr() const; // Returns NULL if not oop ptr type
267 const TypeOopPtr *is_oopptr() const; // Java-style GC'd pointer
268 const TypeInstPtr *isa_instptr() const; // Returns NULL if not InstPtr
269 const TypeInstPtr *is_instptr() const; // Instance
270 const TypeAryPtr *isa_aryptr() const; // Returns NULL if not AryPtr
271 const TypeAryPtr *is_aryptr() const; // Array oop
272
273 const TypeMetadataPtr *isa_metadataptr() const; // Returns NULL if not oop ptr type
274 const TypeMetadataPtr *is_metadataptr() const; // Java-style GC'd pointer
275 const TypeKlassPtr *isa_klassptr() const; // Returns NULL if not KlassPtr
276 const TypeKlassPtr *is_klassptr() const; // assert if not KlassPtr
277
278 virtual bool is_finite() const; // Has a finite value
279 virtual bool is_nan() const; // Is not a number (NaN)
280
281 // Returns this ptr type or the equivalent ptr type for this compressed pointer.
282 const TypePtr* make_ptr() const;
283
284 // Returns this oopptr type or the equivalent oopptr type for this compressed pointer.
285 // Asserts if the underlying type is not an oopptr or narrowoop.
286 const TypeOopPtr* make_oopptr() const;
287
288 // Returns this compressed pointer or the equivalent compressed version
289 // of this pointer type.
290 const TypeNarrowOop* make_narrowoop() const;
291
292 // Returns this compressed klass pointer or the equivalent
293 // compressed version of this pointer type.
294 const TypeNarrowKlass* make_narrowklass() const;
295
296 // Special test for register pressure heuristic
297 bool is_floatingpoint() const; // True if Float or Double base type
298
299 // Do you have memory, directly or through a tuple?
300 bool has_memory( ) const;
301
302 // TRUE if type is a singleton
303 virtual bool singleton(void) const;
304
305 // TRUE if type is above the lattice centerline, and is therefore vacuous
306 virtual bool empty(void) const;
307
308 // Return a hash for this type. The hash function is public so ConNode
309 // (constants) can hash on their constant, which is represented by a Type.
310 virtual int hash() const;
311
312 // Map ideal registers (machine types) to ideal types
313 static const Type *mreg2type[];
314
315 // Printing, statistics
316 #ifndef PRODUCT
317 void dump_on(outputStream *st) const;
318 void dump() const {
319 dump_on(tty);
320 }
321 virtual void dump2( Dict &d, uint depth, outputStream *st ) const;
322 static void dump_stats();
323 #endif
324 void typerr(const Type *t) const; // Mixing types error
325
326 // Create basic type
327 static const Type* get_const_basic_type(BasicType type) {
328 assert((uint)type <= T_CONFLICT && _const_basic_type[type] != NULL, "bad type");
329 return _const_basic_type[type];
330 }
331
332 // Mapping to the array element's basic type.
333 BasicType array_element_basic_type() const;
334
335 // Create standard type for a ciType:
336 static const Type* get_const_type(ciType* type);
337
338 // Create standard zero value:
339 static const Type* get_zero_type(BasicType type) {
340 assert((uint)type <= T_CONFLICT && _zero_type[type] != NULL, "bad type");
341 return _zero_type[type];
342 }
343
344 // Report if this is a zero value (not top).
345 bool is_zero_type() const {
346 BasicType type = basic_type();
347 if (type == T_VOID || type >= T_CONFLICT)
348 return false;
349 else
350 return (this == _zero_type[type]);
351 }
352
353 // Convenience common pre-built types.
354 static const Type *ABIO;
355 static const Type *BOTTOM;
356 static const Type *CONTROL;
357 static const Type *DOUBLE;
358 static const Type *FLOAT;
359 static const Type *HALF;
360 static const Type *MEMORY;
361 static const Type *MULTI;
362 static const Type *RETURN_ADDRESS;
363 static const Type *TOP;
364
365 // Mapping from compiler type to VM BasicType
366 BasicType basic_type() const { return _type_info[_base].basic_type; }
367 int ideal_reg() const { return _type_info[_base].ideal_reg; }
368 const char* msg() const { return _type_info[_base].msg; }
369 bool isa_oop_ptr() const { return _type_info[_base].isa_oop; }
370 relocInfo::relocType reloc() const { return _type_info[_base].reloc; }
371
372 // Mapping from CI type system to compiler type:
373 static const Type* get_typeflow_type(ciType* type);
374
375 private:
376 // support arrays
377 static const BasicType _basic_type[];
378 static const Type* _zero_type[T_CONFLICT+1];
379 static const Type* _const_basic_type[T_CONFLICT+1];
380 };
381
382 //------------------------------TypeF------------------------------------------
383 // Class of Float-Constant Types.
384 class TypeF : public Type {
385 TypeF( float f ) : Type(FloatCon), _f(f) {};
386 public:
387 virtual bool eq( const Type *t ) const;
388 virtual int hash() const; // Type specific hashing
389 virtual bool singleton(void) const; // TRUE if type is a singleton
390 virtual bool empty(void) const; // TRUE if type is vacuous
391 public:
392 const float _f; // Float constant
393
394 static const TypeF *make(float f);
395
396 virtual bool is_finite() const; // Has a finite value
397 virtual bool is_nan() const; // Is not a number (NaN)
398
399 virtual const Type *xmeet( const Type *t ) const;
400 virtual const Type *xdual() const; // Compute dual right now.
401 // Convenience common pre-built types.
402 static const TypeF *ZERO; // positive zero only
403 static const TypeF *ONE;
404 #ifndef PRODUCT
405 virtual void dump2( Dict &d, uint depth, outputStream *st ) const;
406 #endif
407 };
408
409 //------------------------------TypeD------------------------------------------
410 // Class of Double-Constant Types.
411 class TypeD : public Type {
412 TypeD( double d ) : Type(DoubleCon), _d(d) {};
413 public:
414 virtual bool eq( const Type *t ) const;
415 virtual int hash() const; // Type specific hashing
416 virtual bool singleton(void) const; // TRUE if type is a singleton
417 virtual bool empty(void) const; // TRUE if type is vacuous
418 public:
419 const double _d; // Double constant
420
421 static const TypeD *make(double d);
422
423 virtual bool is_finite() const; // Has a finite value
424 virtual bool is_nan() const; // Is not a number (NaN)
425
426 virtual const Type *xmeet( const Type *t ) const;
427 virtual const Type *xdual() const; // Compute dual right now.
428 // Convenience common pre-built types.
429 static const TypeD *ZERO; // positive zero only
430 static const TypeD *ONE;
431 #ifndef PRODUCT
432 virtual void dump2( Dict &d, uint depth, outputStream *st ) const;
433 #endif
434 };
435
436 //------------------------------TypeInt----------------------------------------
437 // Class of integer ranges, the set of integers between a lower bound and an
438 // upper bound, inclusive.
439 class TypeInt : public Type {
440 TypeInt( jint lo, jint hi, int w );
441 public:
442 virtual bool eq( const Type *t ) const;
443 virtual int hash() const; // Type specific hashing
444 virtual bool singleton(void) const; // TRUE if type is a singleton
445 virtual bool empty(void) const; // TRUE if type is vacuous
446 public:
447 const jint _lo, _hi; // Lower bound, upper bound
448 const short _widen; // Limit on times we widen this sucker
449
450 static const TypeInt *make(jint lo);
451 // must always specify w
452 static const TypeInt *make(jint lo, jint hi, int w);
453
454 // Check for single integer
455 int is_con() const { return _lo==_hi; }
456 bool is_con(int i) const { return is_con() && _lo == i; }
457 jint get_con() const { assert( is_con(), "" ); return _lo; }
458
459 virtual bool is_finite() const; // Has a finite value
460
461 virtual const Type *xmeet( const Type *t ) const;
462 virtual const Type *xdual() const; // Compute dual right now.
463 virtual const Type *widen( const Type *t, const Type* limit_type ) const;
464 virtual const Type *narrow( const Type *t ) const;
465 // Do not kill _widen bits.
466 virtual const Type *filter( const Type *kills ) const;
467 // Convenience common pre-built types.
468 static const TypeInt *MINUS_1;
469 static const TypeInt *ZERO;
470 static const TypeInt *ONE;
471 static const TypeInt *BOOL;
472 static const TypeInt *CC;
473 static const TypeInt *CC_LT; // [-1] == MINUS_1
474 static const TypeInt *CC_GT; // [1] == ONE
475 static const TypeInt *CC_EQ; // [0] == ZERO
476 static const TypeInt *CC_LE; // [-1,0]
477 static const TypeInt *CC_GE; // [0,1] == BOOL (!)
478 static const TypeInt *BYTE;
479 static const TypeInt *UBYTE;
480 static const TypeInt *CHAR;
481 static const TypeInt *SHORT;
482 static const TypeInt *POS;
483 static const TypeInt *POS1;
484 static const TypeInt *INT;
485 static const TypeInt *SYMINT; // symmetric range [-max_jint..max_jint]
486 #ifndef PRODUCT
487 virtual void dump2( Dict &d, uint depth, outputStream *st ) const;
488 #endif
489 };
490
491
492 //------------------------------TypeLong---------------------------------------
493 // Class of long integer ranges, the set of integers between a lower bound and
494 // an upper bound, inclusive.
495 class TypeLong : public Type {
496 TypeLong( jlong lo, jlong hi, int w );
497 public:
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 public:
503 const jlong _lo, _hi; // Lower bound, upper bound
504 const short _widen; // Limit on times we widen this sucker
505
506 static const TypeLong *make(jlong lo);
507 // must always specify w
508 static const TypeLong *make(jlong lo, jlong hi, int w);
509
510 // Check for single integer
511 int is_con() const { return _lo==_hi; }
512 bool is_con(int i) const { return is_con() && _lo == i; }
513 jlong get_con() const { assert( is_con(), "" ); return _lo; }
514
515 virtual bool is_finite() const; // Has a finite value
516
517 virtual const Type *xmeet( const Type *t ) const;
518 virtual const Type *xdual() const; // Compute dual right now.
519 virtual const Type *widen( const Type *t, const Type* limit_type ) const;
520 virtual const Type *narrow( const Type *t ) const;
521 // Do not kill _widen bits.
522 virtual const Type *filter( const Type *kills ) const;
523 // Convenience common pre-built types.
524 static const TypeLong *MINUS_1;
525 static const TypeLong *ZERO;
526 static const TypeLong *ONE;
527 static const TypeLong *POS;
528 static const TypeLong *LONG;
529 static const TypeLong *INT; // 32-bit subrange [min_jint..max_jint]
530 static const TypeLong *UINT; // 32-bit unsigned [0..max_juint]
531 #ifndef PRODUCT
532 virtual void dump2( Dict &d, uint, outputStream *st ) const;// Specialized per-Type dumping
533 #endif
534 };
535
536 //------------------------------TypeTuple--------------------------------------
537 // Class of Tuple Types, essentially type collections for function signatures
538 // and class layouts. It happens to also be a fast cache for the HotSpot
539 // signature types.
540 class TypeTuple : public Type {
541 TypeTuple( uint cnt, const Type **fields ) : Type(Tuple), _cnt(cnt), _fields(fields) { }
542 public:
543 virtual bool eq( const Type *t ) const;
544 virtual int hash() const; // Type specific hashing
545 virtual bool singleton(void) const; // TRUE if type is a singleton
546 virtual bool empty(void) const; // TRUE if type is vacuous
547
548 public:
549 const uint _cnt; // Count of fields
550 const Type ** const _fields; // Array of field types
551
552 // Accessors:
553 uint cnt() const { return _cnt; }
554 const Type* field_at(uint i) const {
555 assert(i < _cnt, "oob");
556 return _fields[i];
557 }
558 void set_field_at(uint i, const Type* t) {
559 assert(i < _cnt, "oob");
560 _fields[i] = t;
561 }
562
563 static const TypeTuple *make( uint cnt, const Type **fields );
564 static const TypeTuple *make_range(ciSignature *sig);
565 static const TypeTuple *make_domain(ciInstanceKlass* recv, ciSignature *sig);
566
567 // Subroutine call type with space allocated for argument types
568 static const Type **fields( uint arg_cnt );
569
570 virtual const Type *xmeet( const Type *t ) const;
571 virtual const Type *xdual() const; // Compute dual right now.
572 // Convenience common pre-built types.
573 static const TypeTuple *IFBOTH;
574 static const TypeTuple *IFFALSE;
575 static const TypeTuple *IFTRUE;
576 static const TypeTuple *IFNEITHER;
577 static const TypeTuple *LOOPBODY;
578 static const TypeTuple *MEMBAR;
579 static const TypeTuple *STORECONDITIONAL;
580 static const TypeTuple *START_I2C;
581 static const TypeTuple *INT_PAIR;
582 static const TypeTuple *LONG_PAIR;
583 #ifndef PRODUCT
584 virtual void dump2( Dict &d, uint, outputStream *st ) const; // Specialized per-Type dumping
585 #endif
586 };
587
588 //------------------------------TypeAry----------------------------------------
589 // Class of Array Types
590 class TypeAry : public Type {
591 TypeAry( const Type *elem, const TypeInt *size) : Type(Array),
592 _elem(elem), _size(size) {}
593 public:
594 virtual bool eq( const Type *t ) const;
595 virtual int hash() const; // Type specific hashing
596 virtual bool singleton(void) const; // TRUE if type is a singleton
597 virtual bool empty(void) const; // TRUE if type is vacuous
598
599 private:
600 const Type *_elem; // Element type of array
601 const TypeInt *_size; // Elements in array
602 friend class TypeAryPtr;
603
604 public:
605 static const TypeAry *make( const Type *elem, const TypeInt *size);
606
607 virtual const Type *xmeet( const Type *t ) const;
608 virtual const Type *xdual() const; // Compute dual right now.
609 bool ary_must_be_exact() const; // true if arrays of such are never generic
610 #ifdef ASSERT
611 // One type is interface, the other is oop
612 virtual bool interface_vs_oop(const Type *t) const;
613 #endif
614 #ifndef PRODUCT
615 virtual void dump2( Dict &d, uint, outputStream *st ) const; // Specialized per-Type dumping
616 #endif
617 };
618
619 //------------------------------TypeVect---------------------------------------
620 // Class of Vector Types
621 class TypeVect : public Type {
622 const Type* _elem; // Vector's element type
623 const uint _length; // Elements in vector (power of 2)
624
625 protected:
626 TypeVect(TYPES t, const Type* elem, uint length) : Type(t),
627 _elem(elem), _length(length) {}
628
629 public:
630 const Type* element_type() const { return _elem; }
631 BasicType element_basic_type() const { return _elem->array_element_basic_type(); }
632 uint length() const { return _length; }
633 uint length_in_bytes() const {
634 return _length * type2aelembytes(element_basic_type());
635 }
636
637 virtual bool eq(const Type *t) const;
638 virtual int hash() const; // Type specific hashing
639 virtual bool singleton(void) const; // TRUE if type is a singleton
640 virtual bool empty(void) const; // TRUE if type is vacuous
641
642 static const TypeVect *make(const BasicType elem_bt, uint length) {
643 // Use bottom primitive type.
644 return make(get_const_basic_type(elem_bt), length);
645 }
646 // Used directly by Replicate nodes to construct singleton vector.
647 static const TypeVect *make(const Type* elem, uint length);
648
649 virtual const Type *xmeet( const Type *t) const;
650 virtual const Type *xdual() const; // Compute dual right now.
651
652 static const TypeVect *VECTS;
653 static const TypeVect *VECTD;
654 static const TypeVect *VECTX;
655 static const TypeVect *VECTY;
656
657 #ifndef PRODUCT
658 virtual void dump2(Dict &d, uint, outputStream *st) const; // Specialized per-Type dumping
659 #endif
660 };
661
662 class TypeVectS : public TypeVect {
663 friend class TypeVect;
664 TypeVectS(const Type* elem, uint length) : TypeVect(VectorS, elem, length) {}
665 };
666
667 class TypeVectD : public TypeVect {
668 friend class TypeVect;
669 TypeVectD(const Type* elem, uint length) : TypeVect(VectorD, elem, length) {}
670 };
671
672 class TypeVectX : public TypeVect {
673 friend class TypeVect;
674 TypeVectX(const Type* elem, uint length) : TypeVect(VectorX, elem, length) {}
675 };
676
677 class TypeVectY : public TypeVect {
678 friend class TypeVect;
679 TypeVectY(const Type* elem, uint length) : TypeVect(VectorY, elem, length) {}
680 };
681
682 //------------------------------TypePtr----------------------------------------
683 // Class of machine Pointer Types: raw data, instances or arrays.
684 // If the _base enum is AnyPtr, then this refers to all of the above.
685 // Otherwise the _base will indicate which subset of pointers is affected,
686 // and the class will be inherited from.
687 class TypePtr : public Type {
688 friend class TypeNarrowPtr;
689 public:
690 enum PTR { TopPTR, AnyNull, Constant, Null, NotNull, BotPTR, lastPTR };
691 protected:
692 TypePtr( TYPES t, PTR ptr, int offset ) : Type(t), _ptr(ptr), _offset(offset) {}
693 virtual bool eq( const Type *t ) const;
694 virtual int hash() const; // Type specific hashing
695 static const PTR ptr_meet[lastPTR][lastPTR];
696 static const PTR ptr_dual[lastPTR];
697 static const char * const ptr_msg[lastPTR];
698
699 public:
700 const int _offset; // Offset into oop, with TOP & BOT
701 const PTR _ptr; // Pointer equivalence class
702
703 const int offset() const { return _offset; }
704 const PTR ptr() const { return _ptr; }
705
706 static const TypePtr *make( TYPES t, PTR ptr, int offset );
707
708 // Return a 'ptr' version of this type
709 virtual const Type *cast_to_ptr_type(PTR ptr) const;
710
711 virtual intptr_t get_con() const;
712
713 int xadd_offset( intptr_t offset ) const;
714 virtual const TypePtr *add_offset( intptr_t offset ) const;
715
716 virtual bool singleton(void) const; // TRUE if type is a singleton
717 virtual bool empty(void) const; // TRUE if type is vacuous
718 virtual const Type *xmeet( const Type *t ) const;
719 int meet_offset( int offset ) const;
720 int dual_offset( ) const;
721 virtual const Type *xdual() const; // Compute dual right now.
722
723 // meet, dual and join over pointer equivalence sets
724 PTR meet_ptr( const PTR in_ptr ) const { return ptr_meet[in_ptr][ptr()]; }
725 PTR dual_ptr() const { return ptr_dual[ptr()]; }
726
727 // This is textually confusing unless one recalls that
728 // join(t) == dual()->meet(t->dual())->dual().
729 PTR join_ptr( const PTR in_ptr ) const {
730 return ptr_dual[ ptr_meet[ ptr_dual[in_ptr] ] [ dual_ptr() ] ];
731 }
732
733 // Tests for relation to centerline of type lattice:
734 static bool above_centerline(PTR ptr) { return (ptr <= AnyNull); }
735 static bool below_centerline(PTR ptr) { return (ptr >= NotNull); }
736 // Convenience common pre-built types.
737 static const TypePtr *NULL_PTR;
738 static const TypePtr *NOTNULL;
739 static const TypePtr *BOTTOM;
740 #ifndef PRODUCT
741 virtual void dump2( Dict &d, uint depth, outputStream *st ) const;
742 #endif
743 };
744
745 //------------------------------TypeRawPtr-------------------------------------
746 // Class of raw pointers, pointers to things other than Oops. Examples
747 // include the stack pointer, top of heap, card-marking area, handles, etc.
748 class TypeRawPtr : public TypePtr {
749 protected:
750 TypeRawPtr( PTR ptr, address bits ) : TypePtr(RawPtr,ptr,0), _bits(bits){}
751 public:
752 virtual bool eq( const Type *t ) const;
753 virtual int hash() const; // Type specific hashing
754
755 const address _bits; // Constant value, if applicable
756
757 static const TypeRawPtr *make( PTR ptr );
758 static const TypeRawPtr *make( address bits );
759
760 // Return a 'ptr' version of this type
761 virtual const Type *cast_to_ptr_type(PTR ptr) const;
762
763 virtual intptr_t get_con() const;
764
765 virtual const TypePtr *add_offset( intptr_t offset ) const;
766
767 virtual const Type *xmeet( const Type *t ) const;
768 virtual const Type *xdual() const; // Compute dual right now.
769 // Convenience common pre-built types.
770 static const TypeRawPtr *BOTTOM;
771 static const TypeRawPtr *NOTNULL;
772 #ifndef PRODUCT
773 virtual void dump2( Dict &d, uint depth, outputStream *st ) const;
774 #endif
775 };
776
777 //------------------------------TypeOopPtr-------------------------------------
778 // Some kind of oop (Java pointer), either klass or instance or array.
779 class TypeOopPtr : public TypePtr {
780 protected:
781 TypeOopPtr( TYPES t, PTR ptr, ciKlass* k, bool xk, ciObject* o, int offset, int instance_id );
782 public:
783 virtual bool eq( const Type *t ) const;
784 virtual int hash() const; // Type specific hashing
785 virtual bool singleton(void) const; // TRUE if type is a singleton
786 enum {
787 InstanceTop = -1, // undefined instance
788 InstanceBot = 0 // any possible instance
789 };
790 protected:
791
792 // Oop is NULL, unless this is a constant oop.
793 ciObject* _const_oop; // Constant oop
794 // If _klass is NULL, then so is _sig. This is an unloaded klass.
795 ciKlass* _klass; // Klass object
796 // Does the type exclude subclasses of the klass? (Inexact == polymorphic.)
797 bool _klass_is_exact;
798 bool _is_ptr_to_narrowoop;
799 bool _is_ptr_to_narrowklass;
800 bool _is_ptr_to_boxed_value;
801
802 // If not InstanceTop or InstanceBot, indicates that this is
803 // a particular instance of this type which is distinct.
804 // This is the the node index of the allocation node creating this instance.
805 int _instance_id;
806
807 static const TypeOopPtr* make_from_klass_common(ciKlass* klass, bool klass_change, bool try_for_exact);
808
809 int dual_instance_id() const;
810 int meet_instance_id(int uid) const;
811
812 public:
813 // Creates a type given a klass. Correctly handles multi-dimensional arrays
814 // Respects UseUniqueSubclasses.
815 // If the klass is final, the resulting type will be exact.
816 static const TypeOopPtr* make_from_klass(ciKlass* klass) {
817 return make_from_klass_common(klass, true, false);
818 }
819 // Same as before, but will produce an exact type, even if
820 // the klass is not final, as long as it has exactly one implementation.
821 static const TypeOopPtr* make_from_klass_unique(ciKlass* klass) {
822 return make_from_klass_common(klass, true, true);
823 }
824 // Same as before, but does not respects UseUniqueSubclasses.
825 // Use this only for creating array element types.
826 static const TypeOopPtr* make_from_klass_raw(ciKlass* klass) {
827 return make_from_klass_common(klass, false, false);
828 }
829 // Creates a singleton type given an object.
830 // If the object cannot be rendered as a constant,
831 // may return a non-singleton type.
832 // If require_constant, produce a NULL if a singleton is not possible.
833 static const TypeOopPtr* make_from_constant(ciObject* o,
834 bool require_constant = false,
835 bool not_null_elements = false);
836
837 // Make a generic (unclassed) pointer to an oop.
838 static const TypeOopPtr* make(PTR ptr, int offset, int instance_id);
839
840 ciObject* const_oop() const { return _const_oop; }
841 virtual ciKlass* klass() const { return _klass; }
842 bool klass_is_exact() const { return _klass_is_exact; }
843
844 // Returns true if this pointer points at memory which contains a
845 // compressed oop references.
846 bool is_ptr_to_narrowoop_nv() const { return _is_ptr_to_narrowoop; }
847 bool is_ptr_to_narrowklass_nv() const { return _is_ptr_to_narrowklass; }
848 bool is_ptr_to_boxed_value() const { return _is_ptr_to_boxed_value; }
849 bool is_known_instance() const { return _instance_id > 0; }
850 int instance_id() const { return _instance_id; }
851 bool is_known_instance_field() const { return is_known_instance() && _offset >= 0; }
852
853 virtual intptr_t get_con() const;
854
855 virtual const Type *cast_to_ptr_type(PTR ptr) const;
856
857 virtual const Type *cast_to_exactness(bool klass_is_exact) const;
858
859 virtual const TypeOopPtr *cast_to_instance_id(int instance_id) const;
860
861 // corresponding pointer to klass, for a given instance
862 const TypeKlassPtr* as_klass_type() const;
863
864 virtual const TypePtr *add_offset( intptr_t offset ) const;
865
866 virtual const Type *xmeet( const Type *t ) const;
867 virtual const Type *xdual() const; // Compute dual right now.
868
869 // Do not allow interface-vs.-noninterface joins to collapse to top.
870 virtual const Type *filter( const Type *kills ) const;
871
872 // Convenience common pre-built type.
873 static const TypeOopPtr *BOTTOM;
874 #ifndef PRODUCT
875 virtual void dump2( Dict &d, uint depth, outputStream *st ) const;
876 #endif
877 };
878
879 //------------------------------TypeInstPtr------------------------------------
880 // Class of Java object pointers, pointing either to non-array Java instances
881 // or to a Klass* (including array klasses).
882 class TypeInstPtr : public TypeOopPtr {
883 TypeInstPtr( PTR ptr, ciKlass* k, bool xk, ciObject* o, int offset, int instance_id );
884 virtual bool eq( const Type *t ) const;
885 virtual int hash() const; // Type specific hashing
886
887 ciSymbol* _name; // class name
888
889 public:
890 ciSymbol* name() const { return _name; }
891
892 bool is_loaded() const { return _klass->is_loaded(); }
893
894 // Make a pointer to a constant oop.
895 static const TypeInstPtr *make(ciObject* o) {
896 return make(TypePtr::Constant, o->klass(), true, o, 0);
897 }
898 // Make a pointer to a constant oop with offset.
899 static const TypeInstPtr *make(ciObject* o, int offset) {
900 return make(TypePtr::Constant, o->klass(), true, o, offset);
901 }
902
903 // Make a pointer to some value of type klass.
904 static const TypeInstPtr *make(PTR ptr, ciKlass* klass) {
905 return make(ptr, klass, false, NULL, 0);
906 }
907
908 // Make a pointer to some non-polymorphic value of exactly type klass.
909 static const TypeInstPtr *make_exact(PTR ptr, ciKlass* klass) {
910 return make(ptr, klass, true, NULL, 0);
911 }
912
913 // Make a pointer to some value of type klass with offset.
914 static const TypeInstPtr *make(PTR ptr, ciKlass* klass, int offset) {
915 return make(ptr, klass, false, NULL, offset);
916 }
917
918 // Make a pointer to an oop.
919 static const TypeInstPtr *make(PTR ptr, ciKlass* k, bool xk, ciObject* o, int offset, int instance_id = InstanceBot );
920
921 /** Create constant type for a constant boxed value */
922 const Type* get_const_boxed_value() const;
923
924 // If this is a java.lang.Class constant, return the type for it or NULL.
925 // Pass to Type::get_const_type to turn it to a type, which will usually
926 // be a TypeInstPtr, but may also be a TypeInt::INT for int.class, etc.
927 ciType* java_mirror_type() const;
928
929 virtual const Type *cast_to_ptr_type(PTR ptr) const;
930
931 virtual const Type *cast_to_exactness(bool klass_is_exact) const;
932
933 virtual const TypeOopPtr *cast_to_instance_id(int instance_id) const;
934
935 virtual const TypePtr *add_offset( intptr_t offset ) const;
936
937 virtual const Type *xmeet( const Type *t ) const;
938 virtual const TypeInstPtr *xmeet_unloaded( const TypeInstPtr *t ) const;
939 virtual const Type *xdual() const; // Compute dual right now.
940
941 // Convenience common pre-built types.
942 static const TypeInstPtr *NOTNULL;
943 static const TypeInstPtr *BOTTOM;
944 static const TypeInstPtr *MIRROR;
945 static const TypeInstPtr *MARK;
946 static const TypeInstPtr *KLASS;
947 #ifndef PRODUCT
948 virtual void dump2( Dict &d, uint depth, outputStream *st ) const; // Specialized per-Type dumping
949 #endif
950 };
951
952 //------------------------------TypeAryPtr-------------------------------------
953 // Class of Java array pointers
954 class TypeAryPtr : public TypeOopPtr {
955 TypeAryPtr( PTR ptr, ciObject* o, const TypeAry *ary, ciKlass* k, bool xk,
956 int offset, int instance_id, bool is_autobox_cache )
957 : TypeOopPtr(AryPtr,ptr,k,xk,o,offset, instance_id),
958 _ary(ary),
959 _is_autobox_cache(is_autobox_cache)
960 {
961 #ifdef ASSERT
962 if (k != NULL) {
963 // Verify that specified klass and TypeAryPtr::klass() follow the same rules.
964 ciKlass* ck = compute_klass(true);
965 if (k != ck) {
966 this->dump(); tty->cr();
967 tty->print(" k: ");
968 k->print(); tty->cr();
969 tty->print("ck: ");
970 if (ck != NULL) ck->print();
971 else tty->print("<NULL>");
972 tty->cr();
973 assert(false, "unexpected TypeAryPtr::_klass");
974 }
975 }
976 #endif
977 }
978 virtual bool eq( const Type *t ) const;
979 virtual int hash() const; // Type specific hashing
980 const TypeAry *_ary; // Array we point into
981 const bool _is_autobox_cache;
982
983 ciKlass* compute_klass(DEBUG_ONLY(bool verify = false)) const;
984
985 public:
986 // Accessors
987 ciKlass* klass() const;
988 const TypeAry* ary() const { return _ary; }
989 const Type* elem() const { return _ary->_elem; }
990 const TypeInt* size() const { return _ary->_size; }
991
992 bool is_autobox_cache() const { return _is_autobox_cache; }
993
994 static const TypeAryPtr *make( PTR ptr, const TypeAry *ary, ciKlass* k, bool xk, int offset, int instance_id = InstanceBot);
995 // Constant pointer to array
996 static const TypeAryPtr *make( PTR ptr, ciObject* o, const TypeAry *ary, ciKlass* k, bool xk, int offset, int instance_id = InstanceBot, bool is_autobox_cache = false);
997
998 // Return a 'ptr' version of this type
999 virtual const Type *cast_to_ptr_type(PTR ptr) const;
1000
1001 virtual const Type *cast_to_exactness(bool klass_is_exact) const;
1002
1003 virtual const TypeOopPtr *cast_to_instance_id(int instance_id) const;
1004
1005 virtual const TypeAryPtr* cast_to_size(const TypeInt* size) const;
1006 virtual const TypeInt* narrow_size_type(const TypeInt* size) const;
1007
1008 virtual bool empty(void) const; // TRUE if type is vacuous
1009 virtual const TypePtr *add_offset( intptr_t offset ) const;
1010
1011 virtual const Type *xmeet( const Type *t ) const;
1012 virtual const Type *xdual() const; // Compute dual right now.
1013
1014 // Convenience common pre-built types.
1015 static const TypeAryPtr *RANGE;
1016 static const TypeAryPtr *OOPS;
1017 static const TypeAryPtr *NARROWOOPS;
1018 static const TypeAryPtr *BYTES;
1019 static const TypeAryPtr *SHORTS;
1020 static const TypeAryPtr *CHARS;
1021 static const TypeAryPtr *INTS;
1022 static const TypeAryPtr *LONGS;
1023 static const TypeAryPtr *FLOATS;
1024 static const TypeAryPtr *DOUBLES;
1025 // selects one of the above:
1026 static const TypeAryPtr *get_array_body_type(BasicType elem) {
1027 assert((uint)elem <= T_CONFLICT && _array_body_type[elem] != NULL, "bad elem type");
1028 return _array_body_type[elem];
1029 }
1030 static const TypeAryPtr *_array_body_type[T_CONFLICT+1];
1031 // sharpen the type of an int which is used as an array size
1032 #ifdef ASSERT
1033 // One type is interface, the other is oop
1034 virtual bool interface_vs_oop(const Type *t) const;
1035 #endif
1036 #ifndef PRODUCT
1037 virtual void dump2( Dict &d, uint depth, outputStream *st ) const; // Specialized per-Type dumping
1038 #endif
1039 };
1040
1041 //------------------------------TypeMetadataPtr-------------------------------------
1042 // Some kind of metadata, either Method*, MethodData* or CPCacheOop
1043 class TypeMetadataPtr : public TypePtr {
1044 protected:
1045 TypeMetadataPtr(PTR ptr, ciMetadata* metadata, int offset);
1046 public:
1047 virtual bool eq( const Type *t ) const;
1048 virtual int hash() const; // Type specific hashing
1049 virtual bool singleton(void) const; // TRUE if type is a singleton
1050
1051 private:
1052 ciMetadata* _metadata;
1053
1054 public:
1055 static const TypeMetadataPtr* make(PTR ptr, ciMetadata* m, int offset);
1056
1057 static const TypeMetadataPtr* make(ciMethod* m);
1058 static const TypeMetadataPtr* make(ciMethodData* m);
1059
1060 ciMetadata* metadata() const { return _metadata; }
1061
1062 virtual const Type *cast_to_ptr_type(PTR ptr) const;
1063
1064 virtual const TypePtr *add_offset( intptr_t offset ) const;
1065
1066 virtual const Type *xmeet( const Type *t ) const;
1067 virtual const Type *xdual() const; // Compute dual right now.
1068
1069 virtual intptr_t get_con() const;
1070
1071 // Do not allow interface-vs.-noninterface joins to collapse to top.
1072 virtual const Type *filter( const Type *kills ) const;
1073
1074 // Convenience common pre-built types.
1075 static const TypeMetadataPtr *BOTTOM;
1076
1077 #ifndef PRODUCT
1078 virtual void dump2( Dict &d, uint depth, outputStream *st ) const;
1079 #endif
1080 };
1081
1082 //------------------------------TypeKlassPtr-----------------------------------
1083 // Class of Java Klass pointers
1084 class TypeKlassPtr : public TypePtr {
1085 TypeKlassPtr( PTR ptr, ciKlass* klass, int offset );
1086
1087 public:
1088 virtual bool eq( const Type *t ) const;
1089 virtual int hash() const; // Type specific hashing
1090 virtual bool singleton(void) const; // TRUE if type is a singleton
1091 private:
1092
1093 static const TypeKlassPtr* make_from_klass_common(ciKlass* klass, bool klass_change, bool try_for_exact);
1094
1095 ciKlass* _klass;
1096
1097 // Does the type exclude subclasses of the klass? (Inexact == polymorphic.)
1098 bool _klass_is_exact;
1099
1100 public:
1101 ciSymbol* name() const { return klass()->name(); }
1102
1103 ciKlass* klass() const { return _klass; }
1104 bool klass_is_exact() const { return _klass_is_exact; }
1105
1106 bool is_loaded() const { return klass()->is_loaded(); }
1107
1108 // Creates a type given a klass. Correctly handles multi-dimensional arrays
1109 // Respects UseUniqueSubclasses.
1110 // If the klass is final, the resulting type will be exact.
1111 static const TypeKlassPtr* make_from_klass(ciKlass* klass) {
1112 return make_from_klass_common(klass, true, false);
1113 }
1114 // Same as before, but will produce an exact type, even if
1115 // the klass is not final, as long as it has exactly one implementation.
1116 static const TypeKlassPtr* make_from_klass_unique(ciKlass* klass) {
1117 return make_from_klass_common(klass, true, true);
1118 }
1119 // Same as before, but does not respects UseUniqueSubclasses.
1120 // Use this only for creating array element types.
1121 static const TypeKlassPtr* make_from_klass_raw(ciKlass* klass) {
1122 return make_from_klass_common(klass, false, false);
1123 }
1124
1125 // Make a generic (unclassed) pointer to metadata.
1126 static const TypeKlassPtr* make(PTR ptr, int offset);
1127
1128 // ptr to klass 'k'
1129 static const TypeKlassPtr *make( ciKlass* k ) { return make( TypePtr::Constant, k, 0); }
1130 // ptr to klass 'k' with offset
1131 static const TypeKlassPtr *make( ciKlass* k, int offset ) { return make( TypePtr::Constant, k, offset); }
1132 // ptr to klass 'k' or sub-klass
1133 static const TypeKlassPtr *make( PTR ptr, ciKlass* k, int offset);
1134
1135 virtual const Type *cast_to_ptr_type(PTR ptr) const;
1136
1137 virtual const Type *cast_to_exactness(bool klass_is_exact) const;
1138
1139 // corresponding pointer to instance, for a given class
1140 const TypeOopPtr* as_instance_type() const;
1141
1142 virtual const TypePtr *add_offset( intptr_t offset ) const;
1143 virtual const Type *xmeet( const Type *t ) const;
1144 virtual const Type *xdual() const; // Compute dual right now.
1145
1146 virtual intptr_t get_con() const;
1147
1148 // Convenience common pre-built types.
1149 static const TypeKlassPtr* OBJECT; // Not-null object klass or below
1150 static const TypeKlassPtr* OBJECT_OR_NULL; // Maybe-null version of same
1151 #ifndef PRODUCT
1152 virtual void dump2( Dict &d, uint depth, outputStream *st ) const; // Specialized per-Type dumping
1153 #endif
1154 };
1155
1156 class TypeNarrowPtr : public Type {
1157 protected:
1158 const TypePtr* _ptrtype; // Could be TypePtr::NULL_PTR
1159
1160 TypeNarrowPtr(TYPES t, const TypePtr* ptrtype): _ptrtype(ptrtype),
1161 Type(t) {
1162 assert(ptrtype->offset() == 0 ||
1163 ptrtype->offset() == OffsetBot ||
1164 ptrtype->offset() == OffsetTop, "no real offsets");
1165 }
1166
1167 virtual const TypeNarrowPtr *isa_same_narrowptr(const Type *t) const = 0;
1168 virtual const TypeNarrowPtr *is_same_narrowptr(const Type *t) const = 0;
1169 virtual const TypeNarrowPtr *make_same_narrowptr(const TypePtr *t) const = 0;
1170 virtual const TypeNarrowPtr *make_hash_same_narrowptr(const TypePtr *t) const = 0;
1171 public:
1172 virtual bool eq( const Type *t ) const;
1173 virtual int hash() const; // Type specific hashing
1174 virtual bool singleton(void) const; // TRUE if type is a singleton
1175
1176 virtual const Type *xmeet( const Type *t ) const;
1177 virtual const Type *xdual() const; // Compute dual right now.
1178
1179 virtual intptr_t get_con() const;
1180
1181 // Do not allow interface-vs.-noninterface joins to collapse to top.
1182 virtual const Type *filter( const Type *kills ) const;
1183
1184 virtual bool empty(void) const; // TRUE if type is vacuous
1185
1186 // returns the equivalent ptr type for this compressed pointer
1187 const TypePtr *get_ptrtype() const {
1188 return _ptrtype;
1189 }
1190
1191 #ifndef PRODUCT
1192 virtual void dump2( Dict &d, uint depth, outputStream *st ) const;
1193 #endif
1194 };
1195
1196 //------------------------------TypeNarrowOop----------------------------------
1197 // A compressed reference to some kind of Oop. This type wraps around
1198 // a preexisting TypeOopPtr and forwards most of it's operations to
1199 // the underlying type. It's only real purpose is to track the
1200 // oopness of the compressed oop value when we expose the conversion
1201 // between the normal and the compressed form.
1202 class TypeNarrowOop : public TypeNarrowPtr {
1203 protected:
1204 TypeNarrowOop( const TypePtr* ptrtype): TypeNarrowPtr(NarrowOop, ptrtype) {
1205 }
1206
1207 virtual const TypeNarrowPtr *isa_same_narrowptr(const Type *t) const {
1208 return t->isa_narrowoop();
1209 }
1210
1211 virtual const TypeNarrowPtr *is_same_narrowptr(const Type *t) const {
1212 return t->is_narrowoop();
1213 }
1214
1215 virtual const TypeNarrowPtr *make_same_narrowptr(const TypePtr *t) const {
1216 return new TypeNarrowOop(t);
1217 }
1218
1219 virtual const TypeNarrowPtr *make_hash_same_narrowptr(const TypePtr *t) const {
1220 return (const TypeNarrowPtr*)((new TypeNarrowOop(t))->hashcons());
1221 }
1222
1223 public:
1224
1225 static const TypeNarrowOop *make( const TypePtr* type);
1226
1227 static const TypeNarrowOop* make_from_constant(ciObject* con, bool require_constant = false) {
1228 return make(TypeOopPtr::make_from_constant(con, require_constant));
1229 }
1230
1231 static const TypeNarrowOop *BOTTOM;
1232 static const TypeNarrowOop *NULL_PTR;
1233
1234 #ifndef PRODUCT
1235 virtual void dump2( Dict &d, uint depth, outputStream *st ) const;
1236 #endif
1237 };
1238
1239 //------------------------------TypeNarrowKlass----------------------------------
1240 // A compressed reference to klass pointer. This type wraps around a
1241 // preexisting TypeKlassPtr and forwards most of it's operations to
1242 // the underlying type.
1243 class TypeNarrowKlass : public TypeNarrowPtr {
1244 protected:
1245 TypeNarrowKlass( const TypePtr* ptrtype): TypeNarrowPtr(NarrowKlass, ptrtype) {
1246 }
1247
1248 virtual const TypeNarrowPtr *isa_same_narrowptr(const Type *t) const {
1249 return t->isa_narrowklass();
1250 }
1251
1252 virtual const TypeNarrowPtr *is_same_narrowptr(const Type *t) const {
1253 return t->is_narrowklass();
1254 }
1255
1256 virtual const TypeNarrowPtr *make_same_narrowptr(const TypePtr *t) const {
1257 return new TypeNarrowKlass(t);
1258 }
1259
1260 virtual const TypeNarrowPtr *make_hash_same_narrowptr(const TypePtr *t) const {
1261 return (const TypeNarrowPtr*)((new TypeNarrowKlass(t))->hashcons());
1262 }
1263
1264 public:
1265 static const TypeNarrowKlass *make( const TypePtr* type);
1266
1267 // static const TypeNarrowKlass *BOTTOM;
1268 static const TypeNarrowKlass *NULL_PTR;
1269
1270 #ifndef PRODUCT
1271 virtual void dump2( Dict &d, uint depth, outputStream *st ) const;
1272 #endif
1273 };
1274
1275 //------------------------------TypeFunc---------------------------------------
1276 // Class of Array Types
1277 class TypeFunc : public Type {
1278 TypeFunc( const TypeTuple *domain, const TypeTuple *range ) : Type(Function), _domain(domain), _range(range) {}
1279 virtual bool eq( const Type *t ) const;
1280 virtual int hash() const; // Type specific hashing
1281 virtual bool singleton(void) const; // TRUE if type is a singleton
1282 virtual bool empty(void) const; // TRUE if type is vacuous
1283 public:
1284 // Constants are shared among ADLC and VM
1285 enum { Control = AdlcVMDeps::Control,
1286 I_O = AdlcVMDeps::I_O,
1287 Memory = AdlcVMDeps::Memory,
1288 FramePtr = AdlcVMDeps::FramePtr,
1289 ReturnAdr = AdlcVMDeps::ReturnAdr,
1290 Parms = AdlcVMDeps::Parms
1291 };
1292
1293 const TypeTuple* const _domain; // Domain of inputs
1294 const TypeTuple* const _range; // Range of results
1295
1296 // Accessors:
1297 const TypeTuple* domain() const { return _domain; }
1298 const TypeTuple* range() const { return _range; }
1299
1300 static const TypeFunc *make(ciMethod* method);
1301 static const TypeFunc *make(ciSignature signature, const Type* extra);
1302 static const TypeFunc *make(const TypeTuple* domain, const TypeTuple* range);
1303
1304 virtual const Type *xmeet( const Type *t ) const;
1305 virtual const Type *xdual() const; // Compute dual right now.
1306
1307 BasicType return_type() const;
1308
1309 #ifndef PRODUCT
1310 virtual void dump2( Dict &d, uint depth, outputStream *st ) const; // Specialized per-Type dumping
1311 #endif
1312 // Convenience common pre-built types.
1313 };
1314
1315 //------------------------------accessors--------------------------------------
1316 inline bool Type::is_ptr_to_narrowoop() const {
1317 #ifdef _LP64
1318 return (isa_oopptr() != NULL && is_oopptr()->is_ptr_to_narrowoop_nv());
1319 #else
1320 return false;
1321 #endif
1322 }
1323
1324 inline bool Type::is_ptr_to_narrowklass() const {
1325 #ifdef _LP64
1326 return (isa_oopptr() != NULL && is_oopptr()->is_ptr_to_narrowklass_nv());
1327 #else
1328 return false;
1329 #endif
1330 }
1331
1332 inline float Type::getf() const {
1333 assert( _base == FloatCon, "Not a FloatCon" );
1334 return ((TypeF*)this)->_f;
1335 }
1336
1337 inline double Type::getd() const {
1338 assert( _base == DoubleCon, "Not a DoubleCon" );
1339 return ((TypeD*)this)->_d;
1340 }
1341
1342 inline const TypeInt *Type::is_int() const {
1343 assert( _base == Int, "Not an Int" );
1344 return (TypeInt*)this;
1345 }
1346
1347 inline const TypeInt *Type::isa_int() const {
1348 return ( _base == Int ? (TypeInt*)this : NULL);
1349 }
1350
1351 inline const TypeLong *Type::is_long() const {
1352 assert( _base == Long, "Not a Long" );
1353 return (TypeLong*)this;
1354 }
1355
1356 inline const TypeLong *Type::isa_long() const {
1357 return ( _base == Long ? (TypeLong*)this : NULL);
1358 }
1359
1360 inline const TypeF *Type::isa_float() const {
1361 return ((_base == FloatTop ||
1362 _base == FloatCon ||
1363 _base == FloatBot) ? (TypeF*)this : NULL);
1364 }
1365
1366 inline const TypeF *Type::is_float_constant() const {
1367 assert( _base == FloatCon, "Not a Float" );
1368 return (TypeF*)this;
1369 }
1370
1371 inline const TypeF *Type::isa_float_constant() const {
1372 return ( _base == FloatCon ? (TypeF*)this : NULL);
1373 }
1374
1375 inline const TypeD *Type::isa_double() const {
1376 return ((_base == DoubleTop ||
1377 _base == DoubleCon ||
1378 _base == DoubleBot) ? (TypeD*)this : NULL);
1379 }
1380
1381 inline const TypeD *Type::is_double_constant() const {
1382 assert( _base == DoubleCon, "Not a Double" );
1383 return (TypeD*)this;
1384 }
1385
1386 inline const TypeD *Type::isa_double_constant() const {
1387 return ( _base == DoubleCon ? (TypeD*)this : NULL);
1388 }
1389
1390 inline const TypeTuple *Type::is_tuple() const {
1391 assert( _base == Tuple, "Not a Tuple" );
1392 return (TypeTuple*)this;
1393 }
1394
1395 inline const TypeAry *Type::is_ary() const {
1396 assert( _base == Array , "Not an Array" );
1397 return (TypeAry*)this;
1398 }
1399
1400 inline const TypeVect *Type::is_vect() const {
1401 assert( _base >= VectorS && _base <= VectorY, "Not a Vector" );
1402 return (TypeVect*)this;
1403 }
1404
1405 inline const TypeVect *Type::isa_vect() const {
1406 return (_base >= VectorS && _base <= VectorY) ? (TypeVect*)this : NULL;
1407 }
1408
1409 inline const TypePtr *Type::is_ptr() const {
1410 // AnyPtr is the first Ptr and KlassPtr the last, with no non-ptrs between.
1411 assert(_base >= AnyPtr && _base <= KlassPtr, "Not a pointer");
1412 return (TypePtr*)this;
1413 }
1414
1415 inline const TypePtr *Type::isa_ptr() const {
1416 // AnyPtr is the first Ptr and KlassPtr the last, with no non-ptrs between.
1417 return (_base >= AnyPtr && _base <= KlassPtr) ? (TypePtr*)this : NULL;
1418 }
1419
1420 inline const TypeOopPtr *Type::is_oopptr() const {
1421 // OopPtr is the first and KlassPtr the last, with no non-oops between.
1422 assert(_base >= OopPtr && _base <= AryPtr, "Not a Java pointer" ) ;
1423 return (TypeOopPtr*)this;
1424 }
1425
1426 inline const TypeOopPtr *Type::isa_oopptr() const {
1427 // OopPtr is the first and KlassPtr the last, with no non-oops between.
1428 return (_base >= OopPtr && _base <= AryPtr) ? (TypeOopPtr*)this : NULL;
1429 }
1430
1431 inline const TypeRawPtr *Type::isa_rawptr() const {
1432 return (_base == RawPtr) ? (TypeRawPtr*)this : NULL;
1433 }
1434
1435 inline const TypeRawPtr *Type::is_rawptr() const {
1436 assert( _base == RawPtr, "Not a raw pointer" );
1437 return (TypeRawPtr*)this;
1438 }
1439
1440 inline const TypeInstPtr *Type::isa_instptr() const {
1441 return (_base == InstPtr) ? (TypeInstPtr*)this : NULL;
1442 }
1443
1444 inline const TypeInstPtr *Type::is_instptr() const {
1445 assert( _base == InstPtr, "Not an object pointer" );
1446 return (TypeInstPtr*)this;
1447 }
1448
1449 inline const TypeAryPtr *Type::isa_aryptr() const {
1450 return (_base == AryPtr) ? (TypeAryPtr*)this : NULL;
1451 }
1452
1453 inline const TypeAryPtr *Type::is_aryptr() const {
1454 assert( _base == AryPtr, "Not an array pointer" );
1455 return (TypeAryPtr*)this;
1456 }
1457
1458 inline const TypeNarrowOop *Type::is_narrowoop() const {
1459 // OopPtr is the first and KlassPtr the last, with no non-oops between.
1460 assert(_base == NarrowOop, "Not a narrow oop" ) ;
1461 return (TypeNarrowOop*)this;
1462 }
1463
1464 inline const TypeNarrowOop *Type::isa_narrowoop() const {
1465 // OopPtr is the first and KlassPtr the last, with no non-oops between.
1466 return (_base == NarrowOop) ? (TypeNarrowOop*)this : NULL;
1467 }
1468
1469 inline const TypeNarrowKlass *Type::is_narrowklass() const {
1470 assert(_base == NarrowKlass, "Not a narrow oop" ) ;
1471 return (TypeNarrowKlass*)this;
1472 }
1473
1474 inline const TypeNarrowKlass *Type::isa_narrowklass() const {
1475 return (_base == NarrowKlass) ? (TypeNarrowKlass*)this : NULL;
1476 }
1477
1478 inline const TypeMetadataPtr *Type::is_metadataptr() const {
1479 // MetadataPtr is the first and CPCachePtr the last
1480 assert(_base == MetadataPtr, "Not a metadata pointer" ) ;
1481 return (TypeMetadataPtr*)this;
1482 }
1483
1484 inline const TypeMetadataPtr *Type::isa_metadataptr() const {
1485 return (_base == MetadataPtr) ? (TypeMetadataPtr*)this : NULL;
1486 }
1487
1488 inline const TypeKlassPtr *Type::isa_klassptr() const {
1489 return (_base == KlassPtr) ? (TypeKlassPtr*)this : NULL;
1490 }
1491
1492 inline const TypeKlassPtr *Type::is_klassptr() const {
1493 assert( _base == KlassPtr, "Not a klass pointer" );
1494 return (TypeKlassPtr*)this;
1495 }
1496
1497 inline const TypePtr* Type::make_ptr() const {
1498 return (_base == NarrowOop) ? is_narrowoop()->get_ptrtype() :
1499 ((_base == NarrowKlass) ? is_narrowklass()->get_ptrtype() :
1500 (isa_ptr() ? is_ptr() : NULL));
1501 }
1502
1503 inline const TypeOopPtr* Type::make_oopptr() const {
1504 return (_base == NarrowOop) ? is_narrowoop()->get_ptrtype()->is_oopptr() : is_oopptr();
1505 }
1506
1507 inline const TypeNarrowOop* Type::make_narrowoop() const {
1508 return (_base == NarrowOop) ? is_narrowoop() :
1509 (isa_ptr() ? TypeNarrowOop::make(is_ptr()) : NULL);
1510 }
1511
1512 inline const TypeNarrowKlass* Type::make_narrowklass() const {
1513 return (_base == NarrowKlass) ? is_narrowklass() :
1514 (isa_ptr() ? TypeNarrowKlass::make(is_ptr()) : NULL);
1515 }
1516
1517 inline bool Type::is_floatingpoint() const {
1518 if( (_base == FloatCon) || (_base == FloatBot) ||
1519 (_base == DoubleCon) || (_base == DoubleBot) )
1520 return true;
1521 return false;
1522 }
1523
1524 inline bool Type::is_ptr_to_boxing_obj() const {
1525 const TypeInstPtr* tp = isa_instptr();
1526 return (tp != NULL) && (tp->offset() == 0) &&
1527 tp->klass()->is_instance_klass() &&
1528 tp->klass()->as_instance_klass()->is_box_klass();
1529 }
1530
1531
1532 // ===============================================================
1533 // Things that need to be 64-bits in the 64-bit build but
1534 // 32-bits in the 32-bit build. Done this way to get full
1535 // optimization AND strong typing.
1536 #ifdef _LP64
1537
1538 // For type queries and asserts
1539 #define is_intptr_t is_long
1540 #define isa_intptr_t isa_long
1541 #define find_intptr_t_type find_long_type
1542 #define find_intptr_t_con find_long_con
1543 #define TypeX TypeLong
1544 #define Type_X Type::Long
1545 #define TypeX_X TypeLong::LONG
1546 #define TypeX_ZERO TypeLong::ZERO
1547 // For 'ideal_reg' machine registers
1548 #define Op_RegX Op_RegL
1549 // For phase->intcon variants
1550 #define MakeConX longcon
1551 #define ConXNode ConLNode
1552 // For array index arithmetic
1553 #define MulXNode MulLNode
1554 #define AndXNode AndLNode
1555 #define OrXNode OrLNode
1556 #define CmpXNode CmpLNode
1557 #define SubXNode SubLNode
1558 #define LShiftXNode LShiftLNode
1559 // For object size computation:
1560 #define AddXNode AddLNode
1561 #define RShiftXNode RShiftLNode
1562 // For card marks and hashcodes
1563 #define URShiftXNode URShiftLNode
1564 // UseOptoBiasInlining
1565 #define XorXNode XorLNode
1566 #define StoreXConditionalNode StoreLConditionalNode
1567 // Opcodes
1568 #define Op_LShiftX Op_LShiftL
1569 #define Op_AndX Op_AndL
1570 #define Op_AddX Op_AddL
1571 #define Op_SubX Op_SubL
1572 #define Op_XorX Op_XorL
1573 #define Op_URShiftX Op_URShiftL
1574 // conversions
1575 #define ConvI2X(x) ConvI2L(x)
1576 #define ConvL2X(x) (x)
1577 #define ConvX2I(x) ConvL2I(x)
1578 #define ConvX2L(x) (x)
1579
1580 #else
1581
1582 // For type queries and asserts
1583 #define is_intptr_t is_int
1584 #define isa_intptr_t isa_int
1585 #define find_intptr_t_type find_int_type
1586 #define find_intptr_t_con find_int_con
1587 #define TypeX TypeInt
1588 #define Type_X Type::Int
1589 #define TypeX_X TypeInt::INT
1590 #define TypeX_ZERO TypeInt::ZERO
1591 // For 'ideal_reg' machine registers
1592 #define Op_RegX Op_RegI
1593 // For phase->intcon variants
1594 #define MakeConX intcon
1595 #define ConXNode ConINode
1596 // For array index arithmetic
1597 #define MulXNode MulINode
1598 #define AndXNode AndINode
1599 #define OrXNode OrINode
1600 #define CmpXNode CmpINode
1601 #define SubXNode SubINode
1602 #define LShiftXNode LShiftINode
1603 // For object size computation:
1604 #define AddXNode AddINode
1605 #define RShiftXNode RShiftINode
1606 // For card marks and hashcodes
1607 #define URShiftXNode URShiftINode
1608 // UseOptoBiasInlining
1609 #define XorXNode XorINode
1610 #define StoreXConditionalNode StoreIConditionalNode
1611 // Opcodes
1612 #define Op_LShiftX Op_LShiftI
1613 #define Op_AndX Op_AndI
1614 #define Op_AddX Op_AddI
1615 #define Op_SubX Op_SubI
1616 #define Op_XorX Op_XorI
1617 #define Op_URShiftX Op_URShiftI
1618 // conversions
1619 #define ConvI2X(x) (x)
1620 #define ConvL2X(x) ConvL2I(x)
1621 #define ConvX2I(x) (x)
1622 #define ConvX2L(x) ConvI2L(x)
1623
1624 #endif
1625
1626 #endif // SHARE_VM_OPTO_TYPE_HPP