1 /*
2 * Copyright (c) 1997, 2023, 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 *
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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).
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23 */
24
25 #ifndef SHARE_OPTO_SUBNODE_HPP
26 #define SHARE_OPTO_SUBNODE_HPP
27
28 #include "opto/node.hpp"
29 #include "opto/opcodes.hpp"
30 #include "opto/type.hpp"
31
32 // Portions of code courtesy of Clifford Click
33
34 //------------------------------SUBNode----------------------------------------
35 // Class SUBTRACTION functionality. This covers all the usual 'subtract'
36 // behaviors. Subtract-integer, -float, -double, binary xor, compare-integer,
37 // -float, and -double are all inherited from this class. The compare
38 // functions behave like subtract functions, except that all negative answers
39 // are compressed into -1, and all positive answers compressed to 1.
40 class SubNode : public Node {
41 public:
42 SubNode( Node *in1, Node *in2 ) : Node(0,in1,in2) {
43 init_class_id(Class_Sub);
44 }
45
46 // Handle algebraic identities here. If we have an identity, return the Node
47 // we are equivalent to. We look for "add of zero" as an identity.
48 virtual Node* Identity(PhaseGVN* phase);
49
50 // Compute a new Type for this node. Basically we just do the pre-check,
51 // then call the virtual add() to set the type.
52 virtual const Type* Value(PhaseGVN* phase) const;
53 const Type* Value_common(PhaseValues* phase) const;
54
55 // Supplied function returns the subtractend of the inputs.
56 // This also type-checks the inputs for sanity. Guaranteed never to
57 // be passed a TOP or BOTTOM type, these are filtered out by a pre-check.
58 virtual const Type *sub( const Type *, const Type * ) const = 0;
59
60 // Supplied function to return the additive identity type.
61 // This is returned whenever the subtracts inputs are the same.
62 virtual const Type *add_id() const = 0;
63
64 static SubNode* make(Node* in1, Node* in2, BasicType bt);
65 };
66
67
68 // NOTE: SubINode should be taken away and replaced by add and negate
69 //------------------------------SubINode---------------------------------------
70 // Subtract 2 integers
71 class SubINode : public SubNode {
72 public:
73 SubINode( Node *in1, Node *in2 ) : SubNode(in1,in2) {}
74 virtual int Opcode() const;
75 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
76 virtual const Type *sub( const Type *, const Type * ) const;
77 const Type *add_id() const { return TypeInt::ZERO; }
78 const Type *bottom_type() const { return TypeInt::INT; }
79 virtual uint ideal_reg() const { return Op_RegI; }
80 };
81
82 //------------------------------SubLNode---------------------------------------
83 // Subtract 2 integers
84 class SubLNode : public SubNode {
85 public:
86 SubLNode( Node *in1, Node *in2 ) : SubNode(in1,in2) {}
87 virtual int Opcode() const;
88 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
89 virtual const Type *sub( const Type *, const Type * ) const;
90 const Type *add_id() const { return TypeLong::ZERO; }
91 const Type *bottom_type() const { return TypeLong::LONG; }
92 virtual uint ideal_reg() const { return Op_RegL; }
93 };
94
95 // NOTE: SubFPNode should be taken away and replaced by add and negate
96 //------------------------------SubFPNode--------------------------------------
97 // Subtract 2 floats or doubles
98 class SubFPNode : public SubNode {
99 protected:
100 SubFPNode( Node *in1, Node *in2 ) : SubNode(in1,in2) {}
101 public:
102 const Type* Value(PhaseGVN* phase) const;
103 };
104
105 // NOTE: SubFNode should be taken away and replaced by add and negate
106 //------------------------------SubFNode---------------------------------------
107 // Subtract 2 doubles
108 class SubFNode : public SubFPNode {
109 public:
110 SubFNode( Node *in1, Node *in2 ) : SubFPNode(in1,in2) {}
111 virtual int Opcode() const;
112 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
113 virtual const Type *sub( const Type *, const Type * ) const;
114 const Type *add_id() const { return TypeF::ZERO; }
115 const Type *bottom_type() const { return Type::FLOAT; }
116 virtual uint ideal_reg() const { return Op_RegF; }
117 };
118
119 // NOTE: SubDNode should be taken away and replaced by add and negate
120 //------------------------------SubDNode---------------------------------------
121 // Subtract 2 doubles
122 class SubDNode : public SubFPNode {
123 public:
124 SubDNode( Node *in1, Node *in2 ) : SubFPNode(in1,in2) {}
125 virtual int Opcode() const;
126 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
127 virtual const Type *sub( const Type *, const Type * ) const;
128 const Type *add_id() const { return TypeD::ZERO; }
129 const Type *bottom_type() const { return Type::DOUBLE; }
130 virtual uint ideal_reg() const { return Op_RegD; }
131 };
132
133 //------------------------------CmpNode---------------------------------------
134 // Compare 2 values, returning condition codes (-1, 0 or 1).
135 class CmpNode : public SubNode {
136 public:
137 CmpNode( Node *in1, Node *in2 ) : SubNode(in1,in2) {
138 init_class_id(Class_Cmp);
139 }
140 virtual Node* Identity(PhaseGVN* phase);
141 const Type *add_id() const { return TypeInt::ZERO; }
142 const Type *bottom_type() const { return TypeInt::CC; }
143 virtual uint ideal_reg() const { return Op_RegFlags; }
144
145 static CmpNode *make(Node *in1, Node *in2, BasicType bt, bool unsigned_comp = false);
146 };
147
148 //------------------------------CmpINode---------------------------------------
149 // Compare 2 signed values, returning condition codes (-1, 0 or 1).
150 class CmpINode : public CmpNode {
151 public:
152 CmpINode( Node *in1, Node *in2 ) : CmpNode(in1,in2) {}
153 virtual int Opcode() const;
154 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
155 virtual const Type *sub( const Type *, const Type * ) const;
156 virtual const Type* Value(PhaseGVN* phase) const;
157 };
158
159 //------------------------------CmpUNode---------------------------------------
160 // Compare 2 unsigned values (integer or pointer), returning condition codes (-1, 0 or 1).
161 class CmpUNode : public CmpNode {
162 public:
163 CmpUNode( Node *in1, Node *in2 ) : CmpNode(in1,in2) {}
164 virtual int Opcode() const;
165 virtual const Type *sub( const Type *, const Type * ) const;
166 const Type* Value(PhaseGVN* phase) const;
167 bool is_index_range_check() const;
168 };
169
170 //------------------------------CmpU3Node--------------------------------------
171 // Compare 2 unsigned values, returning integer value (-1, 0 or 1).
172 class CmpU3Node : public CmpUNode {
173 public:
174 CmpU3Node( Node *in1, Node *in2 ) : CmpUNode(in1,in2) {
175 // Since it is not consumed by Bools, it is not really a Cmp.
176 init_class_id(Class_Sub);
177 }
178 virtual int Opcode() const;
179 virtual uint ideal_reg() const { return Op_RegI; }
180 };
181
182 //------------------------------CmpPNode---------------------------------------
183 // Compare 2 pointer values, returning condition codes (-1, 0 or 1).
184 class CmpPNode : public CmpNode {
185 public:
186 CmpPNode( Node *in1, Node *in2 ) : CmpNode(in1,in2) {}
187 virtual int Opcode() const;
188 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
189 virtual const Type *sub( const Type *, const Type * ) const;
190 };
191
192 //------------------------------CmpNNode--------------------------------------
193 // Compare 2 narrow oop values, returning condition codes (-1, 0 or 1).
194 class CmpNNode : public CmpNode {
195 public:
196 CmpNNode( Node *in1, Node *in2 ) : CmpNode(in1,in2) {}
197 virtual int Opcode() const;
198 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
199 virtual const Type *sub( const Type *, const Type * ) const;
200 };
201
202 //------------------------------CmpLNode---------------------------------------
203 // Compare 2 long values, returning condition codes (-1, 0 or 1).
204 class CmpLNode : public CmpNode {
205 public:
206 CmpLNode( Node *in1, Node *in2 ) : CmpNode(in1,in2) {}
207 virtual int Opcode() const;
208 virtual Node* Ideal(PhaseGVN* phase, bool can_reshape);
209 virtual const Type* Value(PhaseGVN* phase) const;
210 virtual const Type *sub( const Type *, const Type * ) const;
211 bool is_double_null_check(PhaseGVN* phase, Node*& a, Node*& b) const;
212 };
213
214 //------------------------------CmpULNode---------------------------------------
215 // Compare 2 unsigned long values, returning condition codes (-1, 0 or 1).
216 class CmpULNode : public CmpNode {
217 public:
218 CmpULNode(Node* in1, Node* in2) : CmpNode(in1, in2) { }
219 virtual int Opcode() const;
220 virtual const Type* sub(const Type*, const Type*) const;
221 };
222
223 //------------------------------CmpL3Node--------------------------------------
224 // Compare 2 long values, returning integer value (-1, 0 or 1).
225 class CmpL3Node : public CmpLNode {
226 public:
227 CmpL3Node( Node *in1, Node *in2 ) : CmpLNode(in1,in2) {
228 // Since it is not consumed by Bools, it is not really a Cmp.
229 init_class_id(Class_Sub);
230 }
231 virtual int Opcode() const;
232 virtual uint ideal_reg() const { return Op_RegI; }
233 };
234
235 //------------------------------CmpUL3Node-------------------------------------
236 // Compare 2 unsigned long values, returning integer value (-1, 0 or 1).
237 class CmpUL3Node : public CmpULNode {
238 public:
239 CmpUL3Node( Node *in1, Node *in2 ) : CmpULNode(in1,in2) {
240 // Since it is not consumed by Bools, it is not really a Cmp.
241 init_class_id(Class_Sub);
242 }
243 virtual int Opcode() const;
244 virtual uint ideal_reg() const { return Op_RegI; }
245 };
246
247 //------------------------------CmpFNode---------------------------------------
248 // Compare 2 float values, returning condition codes (-1, 0 or 1).
249 // This implements the Java bytecode fcmpl, so unordered returns -1.
250 // Operands may not commute.
251 class CmpFNode : public CmpNode {
252 public:
253 CmpFNode( Node *in1, Node *in2 ) : CmpNode(in1,in2) {}
254 virtual int Opcode() const;
255 virtual const Type *sub( const Type *, const Type * ) const { ShouldNotReachHere(); return nullptr; }
256 const Type* Value(PhaseGVN* phase) const;
257 };
258
259 //------------------------------CmpF3Node--------------------------------------
260 // Compare 2 float values, returning integer value (-1, 0 or 1).
261 // This implements the Java bytecode fcmpl, so unordered returns -1.
262 // Operands may not commute.
263 class CmpF3Node : public CmpFNode {
264 public:
265 CmpF3Node( Node *in1, Node *in2 ) : CmpFNode(in1,in2) {
266 // Since it is not consumed by Bools, it is not really a Cmp.
267 init_class_id(Class_Sub);
268 }
269 virtual int Opcode() const;
270 // Since it is not consumed by Bools, it is not really a Cmp.
271 virtual uint ideal_reg() const { return Op_RegI; }
272 };
273
274
275 //------------------------------CmpDNode---------------------------------------
276 // Compare 2 double values, returning condition codes (-1, 0 or 1).
277 // This implements the Java bytecode dcmpl, so unordered returns -1.
278 // Operands may not commute.
279 class CmpDNode : public CmpNode {
280 public:
281 CmpDNode( Node *in1, Node *in2 ) : CmpNode(in1,in2) {}
282 virtual int Opcode() const;
283 virtual const Type *sub( const Type *, const Type * ) const { ShouldNotReachHere(); return nullptr; }
284 const Type* Value(PhaseGVN* phase) const;
285 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
286 };
287
288 //------------------------------CmpD3Node--------------------------------------
289 // Compare 2 double values, returning integer value (-1, 0 or 1).
290 // This implements the Java bytecode dcmpl, so unordered returns -1.
291 // Operands may not commute.
292 class CmpD3Node : public CmpDNode {
293 public:
294 CmpD3Node( Node *in1, Node *in2 ) : CmpDNode(in1,in2) {
295 // Since it is not consumed by Bools, it is not really a Cmp.
296 init_class_id(Class_Sub);
297 }
298 virtual int Opcode() const;
299 virtual uint ideal_reg() const { return Op_RegI; }
300 };
301
302 //--------------------------FlatArrayCheckNode---------------------------------
303 // Returns true if one of the input array objects or array klass ptrs (there
304 // can be multiple) is flat.
305 class FlatArrayCheckNode : public CmpNode {
306 public:
307 enum {
308 Control,
309 Memory,
310 ArrayOrKlass
311 };
312 FlatArrayCheckNode(Compile* C, Node* mem, Node* array_or_klass) : CmpNode(mem, array_or_klass) {
313 init_class_id(Class_FlatArrayCheck);
314 init_flags(Flag_is_macro);
315 C->add_macro_node(this);
316 }
317 virtual int Opcode() const;
318 virtual const Type* sub(const Type*, const Type*) const { ShouldNotReachHere(); return nullptr; }
319 const Type* Value(PhaseGVN* phase) const;
320 virtual Node* Ideal(PhaseGVN* phase, bool can_reshape);
321 };
322
323 //------------------------------BoolTest---------------------------------------
324 // Convert condition codes to a boolean test value (0 or -1).
325 // We pick the values as 3 bits; the low order 2 bits we compare against the
326 // condition codes, the high bit flips the sense of the result.
327 // For vector compares, additionally, the 4th bit indicates if the compare is unsigned
328 struct BoolTest {
329 enum mask { eq = 0, ne = 4, le = 5, ge = 7, lt = 3, gt = 1, overflow = 2, no_overflow = 6, never = 8, illegal = 9,
330 // The following values are used with vector compares
331 // A BoolTest value should not be constructed for such values
332 unsigned_compare = 16,
333 ule = unsigned_compare | le, uge = unsigned_compare | ge, ult = unsigned_compare | lt, ugt = unsigned_compare | gt };
334 mask _test;
335 BoolTest( mask btm ) : _test(btm) { assert((btm & unsigned_compare) == 0, "unsupported");}
336 const Type *cc2logical( const Type *CC ) const;
337 // Commute the test. I use a small table lookup. The table is created as
338 // a simple char array where each element is the ASCII version of a 'mask'
339 // enum from above.
340 mask commute( ) const { return mask("032147658"[_test]-'0'); }
341 mask negate( ) const { return mask(_test^4); }
342 bool is_canonical( ) const { return (_test == BoolTest::ne || _test == BoolTest::lt || _test == BoolTest::le || _test == BoolTest::overflow); }
343 bool is_less( ) const { return _test == BoolTest::lt || _test == BoolTest::le; }
344 bool is_greater( ) const { return _test == BoolTest::gt || _test == BoolTest::ge; }
345 void dump_on(outputStream *st) const;
346 mask merge(BoolTest other) const;
347 };
348
349 //------------------------------BoolNode---------------------------------------
350 // A Node to convert a Condition Codes to a Logical result.
351 class BoolNode : public Node {
352 virtual uint hash() const;
353 virtual bool cmp( const Node &n ) const;
354 virtual uint size_of() const;
355
356 // Try to optimize signed integer comparison
357 Node* fold_cmpI(PhaseGVN* phase, SubNode* cmp, Node* cmp1, int cmp_op,
358 int cmp1_op, const TypeInt* cmp2_type);
359 public:
360 const BoolTest _test;
361 BoolNode(Node *cc, BoolTest::mask t): Node(nullptr,cc), _test(t) {
362 init_class_id(Class_Bool);
363 }
364 // Convert an arbitrary int value to a Bool or other suitable predicate.
365 static Node* make_predicate(Node* test_value, PhaseGVN* phase);
366 // Convert self back to an integer value.
367 Node* as_int_value(PhaseGVN* phase);
368 // Invert sense of self, returning new Bool.
369 BoolNode* negate(PhaseGVN* phase);
370 virtual int Opcode() const;
371 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
372 virtual const Type* Value(PhaseGVN* phase) const;
373 virtual const Type *bottom_type() const { return TypeInt::BOOL; }
374 uint match_edge(uint idx) const { return 0; }
375 virtual uint ideal_reg() const { return Op_RegI; }
376
377 bool is_counted_loop_exit_test();
378 #ifndef PRODUCT
379 virtual void dump_spec(outputStream *st) const;
380 #endif
381 };
382
383 //------------------------------AbsNode----------------------------------------
384 // Abstract class for absolute value. Mostly used to get a handy wrapper
385 // for finding this pattern in the graph.
386 class AbsNode : public Node {
387 public:
388 AbsNode( Node *value ) : Node(0,value) {}
389 virtual Node* Identity(PhaseGVN* phase);
390 virtual Node* Ideal(PhaseGVN* phase, bool can_reshape);
391 virtual const Type* Value(PhaseGVN* phase) const;
392 };
393
394 //------------------------------AbsINode---------------------------------------
395 // Absolute value an integer. Since a naive graph involves control flow, we
396 // "match" it in the ideal world (so the control flow can be removed).
397 class AbsINode : public AbsNode {
398 public:
399 AbsINode( Node *in1 ) : AbsNode(in1) {}
400 virtual int Opcode() const;
401 const Type *bottom_type() const { return TypeInt::INT; }
402 virtual uint ideal_reg() const { return Op_RegI; }
403 };
404
405 //------------------------------AbsLNode---------------------------------------
406 // Absolute value a long. Since a naive graph involves control flow, we
407 // "match" it in the ideal world (so the control flow can be removed).
408 class AbsLNode : public AbsNode {
409 public:
410 AbsLNode( Node *in1 ) : AbsNode(in1) {}
411 virtual int Opcode() const;
412 const Type *bottom_type() const { return TypeLong::LONG; }
413 virtual uint ideal_reg() const { return Op_RegL; }
414 };
415
416 //------------------------------AbsFNode---------------------------------------
417 // Absolute value a float, a common float-point idiom with a cheap hardware
418 // implementation on most chips. Since a naive graph involves control flow, we
419 // "match" it in the ideal world (so the control flow can be removed).
420 class AbsFNode : public AbsNode {
421 public:
422 AbsFNode( Node *in1 ) : AbsNode(in1) {}
423 virtual int Opcode() const;
424 const Type *bottom_type() const { return Type::FLOAT; }
425 virtual uint ideal_reg() const { return Op_RegF; }
426 };
427
428 //------------------------------AbsDNode---------------------------------------
429 // Absolute value a double, a common float-point idiom with a cheap hardware
430 // implementation on most chips. Since a naive graph involves control flow, we
431 // "match" it in the ideal world (so the control flow can be removed).
432 class AbsDNode : public AbsNode {
433 public:
434 AbsDNode( Node *in1 ) : AbsNode(in1) {}
435 virtual int Opcode() const;
436 const Type *bottom_type() const { return Type::DOUBLE; }
437 virtual uint ideal_reg() const { return Op_RegD; }
438 };
439
440
441 //------------------------------CmpLTMaskNode----------------------------------
442 // If p < q, return -1 else return 0. Nice for flow-free idioms.
443 class CmpLTMaskNode : public Node {
444 public:
445 CmpLTMaskNode( Node *p, Node *q ) : Node(0, p, q) {}
446 virtual int Opcode() const;
447 const Type *bottom_type() const { return TypeInt::INT; }
448 virtual uint ideal_reg() const { return Op_RegI; }
449 };
450
451
452 //------------------------------NegNode----------------------------------------
453 class NegNode : public Node {
454 public:
455 NegNode(Node* in1) : Node(0, in1) {
456 init_class_id(Class_Neg);
457 }
458 };
459
460 //------------------------------NegINode---------------------------------------
461 // Negate value an int. For int values, negation is the same as subtraction
462 // from zero
463 class NegINode : public NegNode {
464 public:
465 NegINode(Node *in1) : NegNode(in1) {}
466 virtual int Opcode() const;
467 const Type *bottom_type() const { return TypeInt::INT; }
468 virtual uint ideal_reg() const { return Op_RegI; }
469 };
470
471 //------------------------------NegLNode---------------------------------------
472 // Negate value an int. For int values, negation is the same as subtraction
473 // from zero
474 class NegLNode : public NegNode {
475 public:
476 NegLNode(Node *in1) : NegNode(in1) {}
477 virtual int Opcode() const;
478 const Type *bottom_type() const { return TypeLong::LONG; }
479 virtual uint ideal_reg() const { return Op_RegL; }
480 };
481
482 //------------------------------NegFNode---------------------------------------
483 // Negate value a float. Negating 0.0 returns -0.0, but subtracting from
484 // zero returns +0.0 (per JVM spec on 'fneg' bytecode). As subtraction
485 // cannot be used to replace negation we have to implement negation as ideal
486 // node; note that negation and addition can replace subtraction.
487 class NegFNode : public NegNode {
488 public:
489 NegFNode( Node *in1 ) : NegNode(in1) {}
490 virtual int Opcode() const;
491 const Type *bottom_type() const { return Type::FLOAT; }
492 virtual uint ideal_reg() const { return Op_RegF; }
493 };
494
495 //------------------------------NegDNode---------------------------------------
496 // Negate value a double. Negating 0.0 returns -0.0, but subtracting from
497 // zero returns +0.0 (per JVM spec on 'dneg' bytecode). As subtraction
498 // cannot be used to replace negation we have to implement negation as ideal
499 // node; note that negation and addition can replace subtraction.
500 class NegDNode : public NegNode {
501 public:
502 NegDNode( Node *in1 ) : NegNode(in1) {}
503 virtual int Opcode() const;
504 const Type *bottom_type() const { return Type::DOUBLE; }
505 virtual uint ideal_reg() const { return Op_RegD; }
506 };
507
508 //------------------------------AtanDNode--------------------------------------
509 // arcus tangens of a double
510 class AtanDNode : public Node {
511 public:
512 AtanDNode(Node *c, Node *in1, Node *in2 ) : Node(c, in1, in2) {}
513 virtual int Opcode() const;
514 const Type *bottom_type() const { return Type::DOUBLE; }
515 virtual uint ideal_reg() const { return Op_RegD; }
516 };
517
518
519 //------------------------------SqrtDNode--------------------------------------
520 // square root a double
521 class SqrtDNode : public Node {
522 public:
523 SqrtDNode(Compile* C, Node *c, Node *in1) : Node(c, in1) {
524 init_flags(Flag_is_expensive);
525 C->add_expensive_node(this);
526 }
527 virtual int Opcode() const;
528 const Type *bottom_type() const { return Type::DOUBLE; }
529 virtual uint ideal_reg() const { return Op_RegD; }
530 virtual const Type* Value(PhaseGVN* phase) const;
531 };
532
533 //------------------------------SqrtFNode--------------------------------------
534 // square root a float
535 class SqrtFNode : public Node {
536 public:
537 SqrtFNode(Compile* C, Node *c, Node *in1) : Node(c, in1) {
538 init_flags(Flag_is_expensive);
539 if (c != nullptr) {
540 // Treat node only as expensive if a control input is set because it might
541 // be created from a SqrtDNode in ConvD2FNode::Ideal() that was found to
542 // be unique and therefore has no control input.
543 C->add_expensive_node(this);
544 }
545 }
546 virtual int Opcode() const;
547 const Type *bottom_type() const { return Type::FLOAT; }
548 virtual uint ideal_reg() const { return Op_RegF; }
549 virtual const Type* Value(PhaseGVN* phase) const;
550 };
551
552 //-------------------------------ReverseBytesINode--------------------------------
553 // reverse bytes of an integer
554 class ReverseBytesINode : public Node {
555 public:
556 ReverseBytesINode(Node *c, Node *in1) : Node(c, in1) {}
557 virtual int Opcode() const;
558 const Type *bottom_type() const { return TypeInt::INT; }
559 virtual uint ideal_reg() const { return Op_RegI; }
560 };
561
562 //-------------------------------ReverseBytesLNode--------------------------------
563 // reverse bytes of a long
564 class ReverseBytesLNode : public Node {
565 public:
566 ReverseBytesLNode(Node *c, Node *in1) : Node(c, in1) {}
567 virtual int Opcode() const;
568 const Type *bottom_type() const { return TypeLong::LONG; }
569 virtual uint ideal_reg() const { return Op_RegL; }
570 };
571
572 //-------------------------------ReverseBytesUSNode--------------------------------
573 // reverse bytes of an unsigned short / char
574 class ReverseBytesUSNode : public Node {
575 public:
576 ReverseBytesUSNode(Node *c, Node *in1) : Node(c, in1) {}
577 virtual int Opcode() const;
578 const Type *bottom_type() const { return TypeInt::CHAR; }
579 virtual uint ideal_reg() const { return Op_RegI; }
580 };
581
582 //-------------------------------ReverseBytesSNode--------------------------------
583 // reverse bytes of a short
584 class ReverseBytesSNode : public Node {
585 public:
586 ReverseBytesSNode(Node *c, Node *in1) : Node(c, in1) {}
587 virtual int Opcode() const;
588 const Type *bottom_type() const { return TypeInt::SHORT; }
589 virtual uint ideal_reg() const { return Op_RegI; }
590 };
591
592 //-------------------------------ReverseINode--------------------------------
593 // reverse bits of an int
594 class ReverseINode : public Node {
595 public:
596 ReverseINode(Node *c, Node *in1) : Node(c, in1) {}
597 virtual int Opcode() const;
598 const Type *bottom_type() const { return TypeInt::INT; }
599 virtual uint ideal_reg() const { return Op_RegI; }
600 virtual Node* Identity(PhaseGVN* phase);
601 virtual const Type* Value(PhaseGVN* phase) const;
602 };
603
604 //-------------------------------ReverseLNode--------------------------------
605 // reverse bits of a long
606 class ReverseLNode : public Node {
607 public:
608 ReverseLNode(Node *c, Node *in1) : Node(c, in1) {}
609 virtual int Opcode() const;
610 const Type *bottom_type() const { return TypeLong::LONG; }
611 virtual uint ideal_reg() const { return Op_RegL; }
612 virtual Node* Identity(PhaseGVN* phase);
613 virtual const Type* Value(PhaseGVN* phase) const;
614 };
615
616 #endif // SHARE_OPTO_SUBNODE_HPP