Mercurial > hg > truffle
annotate src/share/vm/adlc/forms.hpp @ 14714:b602356a9cfc
additional canonicalizers for accesses and value nodes (improves number of implicit null checks)
author | Lukas Stadler <lukas.stadler@oracle.com> |
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date | Thu, 20 Mar 2014 17:15:36 +0100 |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_ADLC_FORMS_HPP |
26 #define SHARE_VM_ADLC_FORMS_HPP | |
27 | |
0 | 28 // FORMS.HPP - ADL Parser Generic and Utility Forms Classes |
29 | |
30 #define TRUE 1 | |
31 #define FALSE 0 | |
32 | |
33 // DEFINITIONS OF LEGAL ATTRIBUTE TYPES | |
34 #define INS_ATTR 0 | |
35 #define OP_ATTR 1 | |
36 | |
37 // DEFINITIONS OF LEGAL CONSTRAINT TYPES | |
38 | |
39 // Class List | |
40 class Form; | |
41 class InstructForm; | |
42 class MachNodeForm; | |
43 class OperandForm; | |
44 class OpClassForm; | |
45 class AttributeForm; | |
46 class RegisterForm; | |
47 class PipelineForm; | |
48 class SourceForm; | |
49 class EncodeForm; | |
50 class Component; | |
51 class Constraint; | |
52 class Predicate; | |
53 class MatchRule; | |
54 class Attribute; | |
55 class Effect; | |
56 class ExpandRule; | |
57 class RewriteRule; | |
58 class ConstructRule; | |
59 class FormatRule; | |
60 class Peephole; | |
61 class EncClass; | |
62 class Interface; | |
63 class RegInterface; | |
64 class ConstInterface; | |
65 class MemInterface; | |
66 class CondInterface; | |
67 class Opcode; | |
68 class InsEncode; | |
69 class RegDef; | |
70 class RegClass; | |
71 class AllocClass; | |
72 class ResourceForm; | |
73 class PipeClassForm; | |
74 class PeepMatch; | |
75 class PeepConstraint; | |
76 class PeepReplace; | |
77 class MatchList; | |
78 | |
79 class ArchDesc; | |
80 | |
81 //------------------------------FormDict--------------------------------------- | |
82 // Dictionary containing Forms, and objects derived from forms | |
83 class FormDict { | |
84 private: | |
85 Dict _form; // map names, char*, to their Form* or NULL | |
86 | |
87 // Disable public use of constructor, copy-ctor, operator =, operator == | |
88 FormDict( ); | |
89 FormDict &operator =( const FormDict & ); | |
90 // == compares two dictionaries; they must have the same keys (their keys | |
91 // must match using CmpKey) and they must have the same values (pointer | |
92 // comparison). If so 1 is returned, if not 0 is returned. | |
93 bool operator ==(const FormDict &d) const; // Compare dictionaries for equal | |
94 | |
95 public: | |
96 // cmp is a key comparision routine. hash is a routine to hash a key. | |
97 // FormDict( CmpKey cmp, Hash hash ); | |
98 FormDict( CmpKey cmp, Hash hash, Arena *arena ); | |
99 FormDict( const FormDict & fd ); // Deep-copy guts | |
100 ~FormDict(); | |
101 | |
102 // Return # of key-value pairs in dict | |
103 int Size(void) const; | |
104 | |
105 // Insert inserts the given key-value pair into the dictionary. The prior | |
106 // value of the key is returned; NULL if the key was not previously defined. | |
107 const Form *Insert(const char *name, Form *form); // A new key-value | |
108 | |
109 // Find finds the value of a given key; or NULL if not found. | |
110 // The dictionary is NOT changed. | |
111 const Form *operator [](const char *name) const; // Do a lookup | |
112 | |
113 void dump(); | |
114 }; | |
115 | |
116 // ***** Master Class for ADL Parser Forms ***** | |
117 //------------------------------Form------------------------------------------- | |
118 class Form { | |
119 public: | |
120 static Arena *arena; // arena used by forms | |
121 private: | |
122 static Arena *generate_arena(); // allocate arena used by forms | |
123 | |
124 protected: | |
125 int _ftype; // Indicator for derived class type | |
126 | |
127 public: | |
128 // Public Data | |
129 Form *_next; // Next pointer for form lists | |
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130 int _linenum; // Line number for debugging |
0 | 131 |
132 // Dynamic type check for common forms. | |
133 virtual OpClassForm *is_opclass() const; | |
134 virtual OperandForm *is_operand() const; | |
135 virtual InstructForm *is_instruction() const; | |
136 virtual MachNodeForm *is_machnode() const; | |
137 virtual AttributeForm *is_attribute() const; | |
138 virtual Effect *is_effect() const; | |
139 virtual ResourceForm *is_resource() const; | |
140 virtual PipeClassForm *is_pipeclass() const; | |
141 | |
142 // Check if this form is an operand usable for cisc-spilling | |
143 virtual bool is_cisc_reg(FormDict &globals) const { return false; } | |
144 virtual bool is_cisc_mem(FormDict &globals) const { return false; } | |
145 | |
146 // Public Methods | |
147 Form(int formType=0, int line=0) | |
148 : _next(NULL), _linenum(line), _ftype(formType) { }; | |
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149 virtual ~Form() {}; |
0 | 150 |
151 virtual bool ideal_only() const { | |
152 assert(0,"Check of ideal status on non-instruction/operand form.\n"); | |
153 return FALSE; | |
154 } | |
155 | |
156 // Check constraints after parsing | |
157 virtual bool verify() { return true; } | |
158 | |
159 virtual void dump() { output(stderr); } // Debug printer | |
160 // Write info to output files | |
161 virtual void output(FILE *fp) { fprintf(fp,"Form Output"); } | |
162 | |
163 public: | |
164 // ADLC types, match the last character on ideal operands and instructions | |
165 enum DataType { | |
166 none = 0, // Not a simple type | |
167 idealI = 1, // Integer type | |
168 idealP = 2, // Pointer types, oop(s) | |
169 idealL = 3, // Long type | |
170 idealF = 4, // Float type | |
171 idealD = 5, // Double type | |
172 idealB = 6, // Byte type | |
173 idealC = 7, // Char type | |
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174 idealS = 8, // String type |
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175 idealN = 9, // Narrow oop types |
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176 idealNKlass = 10, // Narrow klass types |
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177 idealV = 11 // Vector type |
0 | 178 }; |
179 // Convert ideal name to a DataType, return DataType::none if not a 'ConX' | |
180 Form::DataType ideal_to_const_type(const char *ideal_type_name) const; | |
181 // Convert ideal name to a DataType, return DataType::none if not a 'sRegX | |
182 Form::DataType ideal_to_sReg_type(const char *name) const; | |
183 // Convert ideal name to a DataType, return DataType::none if not a 'RegX | |
184 Form::DataType ideal_to_Reg_type(const char *name) const; | |
185 | |
186 // Convert ideal name to a DataType, return DataType::none if not a 'LoadX | |
187 Form::DataType is_load_from_memory(const char *opType) const; | |
188 // Convert ideal name to a DataType, return DataType::none if not a 'StoreX | |
189 Form::DataType is_store_to_memory(const char *opType) const; | |
190 | |
191 // ADLC call types, matched with ideal world | |
192 enum CallType { | |
193 invalid_type = 0, // invalid call type | |
194 JAVA_STATIC = 1, // monomorphic entry | |
195 JAVA_DYNAMIC = 2, // possibly megamorphic, inline cache call | |
196 JAVA_COMPILED = 3, // callee will be compiled java | |
197 JAVA_INTERP = 4, // callee will be executed by interpreter | |
198 JAVA_NATIVE = 5, // native entrypoint | |
199 JAVA_RUNTIME = 6, // runtime entrypoint | |
200 JAVA_LEAF = 7 // calling leaf | |
201 }; | |
202 | |
203 // Interface types for operands and operand classes | |
204 enum InterfaceType { | |
205 no_interface = 0, // unknown or inconsistent interface type | |
206 constant_interface = 1, // interface to constants | |
207 register_interface = 2, // interface to registers | |
208 memory_interface = 3, // interface to memory | |
209 conditional_interface = 4 // interface for condition codes | |
210 }; | |
211 virtual Form::InterfaceType interface_type(FormDict &globals) const; | |
212 | |
213 enum CiscSpillInfo { | |
214 Not_cisc_spillable = AdlcVMDeps::Not_cisc_spillable, | |
215 Maybe_cisc_spillable = 0, | |
216 Is_cisc_spillable = 1 | |
217 // ... | |
218 }; | |
219 | |
220 // LEGAL FORM TYPES | |
221 enum { | |
222 INS, | |
223 OPER, | |
224 OPCLASS, | |
225 SRC, | |
226 ADEF, | |
227 REG, | |
228 PIPE, | |
229 CNST, | |
230 PRED, | |
231 ATTR, | |
232 MAT, | |
233 ENC, | |
234 FOR, | |
235 EXP, | |
236 REW, | |
237 EFF, | |
238 RDEF, | |
239 RCL, | |
240 ACL, | |
241 RES, | |
242 PCL, | |
243 PDEF, | |
244 REGL, | |
245 RESL, | |
246 STAL, | |
247 COMP, | |
248 PEEP, | |
249 RESO | |
250 }; | |
251 | |
252 }; | |
253 | |
254 //------------------------------FormList--------------------------------------- | |
255 class FormList { | |
256 private: | |
257 Form *_root; | |
258 Form *_tail; | |
259 Form *_cur; | |
260 int _justReset; // Set immediately after reset | |
261 Form *_cur2; // Nested iterator | |
262 int _justReset2; | |
263 | |
264 public: | |
265 void addForm(Form * entry) { | |
266 if (_tail==NULL) { _root = _tail = _cur = entry;} | |
267 else { _tail->_next = entry; _tail = entry;} | |
268 }; | |
269 Form * current() { return _cur; }; | |
270 Form * iter() { if (_justReset) _justReset = 0; | |
271 else if (_cur) _cur = _cur->_next; | |
272 return _cur;}; | |
273 void reset() { if (_root) {_cur = _root; _justReset = 1;} }; | |
274 | |
275 // Second iterator, state is internal | |
276 Form * current2(){ return _cur2; }; | |
277 Form * iter2() { if (_justReset2) _justReset2 = 0; | |
278 else if (_cur2) _cur2 = _cur2->_next; | |
279 return _cur2;}; | |
280 void reset2() { if (_root) {_cur2 = _root; _justReset2 = 1;} }; | |
281 | |
282 int count() { | |
283 int count = 0; reset(); | |
284 for( Form *cur; (cur = iter()) != NULL; ) { ++count; }; | |
285 return count; | |
286 } | |
287 | |
288 void dump() { | |
289 reset(); | |
290 Form *cur; | |
291 for(; (cur = iter()) != NULL; ) { | |
292 cur->dump(); | |
293 }; | |
294 } | |
295 | |
296 bool verify() { | |
297 bool verified = true; | |
298 | |
299 reset(); | |
300 Form *cur; | |
301 for(; (cur = iter()) != NULL; ) { | |
302 if ( ! cur->verify() ) verified = false; | |
303 }; | |
304 | |
305 return verified; | |
306 } | |
307 | |
308 void output(FILE* fp) { | |
309 reset(); | |
310 Form *cur; | |
311 for( ; (cur = iter()) != NULL; ) { | |
312 cur->output(fp); | |
313 }; | |
314 } | |
315 | |
316 FormList() { _justReset = 1; _justReset2 = 1; _root = NULL; _tail = NULL; _cur = NULL; _cur2 = NULL;}; | |
317 ~FormList(); | |
318 }; | |
319 | |
320 //------------------------------NameList--------------------------------------- | |
321 // Extendable list of pointers, <char *> | |
322 class NameList { | |
323 friend class PreserveIter; | |
324 | |
325 private: | |
326 int _cur; // Insert next entry here; count of entries | |
327 int _max; // Number of spaces allocated | |
328 const char **_names; // Array of names | |
329 | |
330 protected: | |
331 int _iter; // position during iteration | |
332 bool _justReset; // Set immediately after reset | |
333 | |
334 | |
335 public: | |
336 static const char *_signal; // reserved user-defined string | |
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337 static const char *_signal2; // reserved user-defined string |
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338 static const char *_signal3; // reserved user-defined string |
0 | 339 enum { Not_in_list = -1 }; |
340 | |
341 void addName(const char *name); | |
342 void add_signal(); | |
343 void clear(); // Remove all entries | |
344 | |
345 int count() const; | |
346 | |
347 void reset(); // Reset iteration | |
348 const char *iter(); // after reset(), first element : else next | |
349 const char *current(); // return current element in iteration. | |
624 | 350 const char *peek(int skip = 1); // returns element + skip in iteration if there is one |
0 | 351 |
352 bool current_is_signal(); // Return 'true' if current entry is signal | |
353 bool is_signal(const char *entry); // Return true if entry is a signal | |
354 | |
355 bool search(const char *); // Search for a name in the list | |
356 int index(const char *); // Return index of name in list | |
357 const char *name (intptr_t index);// Return name at index in list | |
358 | |
359 void dump(); // output to stderr | |
360 void output(FILE *fp); // Output list of names to 'fp' | |
361 | |
362 NameList(); | |
363 ~NameList(); | |
364 }; | |
365 | |
366 | |
367 // Convenience class to preserve iteration state since iterators are | |
368 // internal instead of being external. | |
369 class PreserveIter { | |
370 private: | |
371 NameList* _list; | |
372 int _iter; | |
373 bool _justReset; | |
374 | |
375 public: | |
376 PreserveIter(NameList* nl) { | |
377 _list = nl; | |
378 _iter = _list->_iter; | |
379 _justReset = _list->_justReset; | |
380 } | |
381 ~PreserveIter() { | |
382 _list->_iter = _iter; | |
383 _list->_justReset = _justReset; | |
384 } | |
385 | |
386 }; | |
387 | |
388 | |
389 //------------------------------NameAndList------------------------------------ | |
390 // Storage for a name and an associated list of names | |
391 class NameAndList { | |
392 private: | |
393 const char *_name; | |
394 NameList _list; | |
395 | |
396 public: | |
397 NameAndList(char *name); | |
398 ~NameAndList(); | |
399 | |
400 // Add to entries in list | |
401 void add_entry(const char *entry); | |
402 | |
403 // Access the name and its associated list. | |
404 const char *name() const; | |
405 void reset(); | |
406 const char *iter(); | |
407 | |
408 int count() { return _list.count(); } | |
409 | |
410 // Return the "index" entry in the list, zero-based | |
411 const char *operator[](int index); | |
412 | |
413 | |
414 void dump(); // output to stderr | |
415 void output(FILE *fp); // Output list of names to 'fp' | |
416 }; | |
417 | |
418 //------------------------------ComponentList--------------------------------- | |
419 // Component lists always have match rule operands first, followed by parameter | |
420 // operands which do not appear in the match list (in order of declaration). | |
421 class ComponentList : private NameList { | |
422 private: | |
423 int _matchcnt; // Count of match rule operands | |
424 | |
425 public: | |
426 | |
427 // This is a batch program. (And I have a destructor bug!) | |
428 void operator delete( void *ptr ) {} | |
429 | |
430 void insert(Component *component, bool mflag); | |
431 void insert(const char *name, const char *opType, int usedef, bool mflag); | |
432 | |
433 int count(); | |
434 int match_count() { return _matchcnt; } // Get count of match rule opers | |
435 | |
436 Component *iter(); // after reset(), first element : else next | |
437 Component *match_iter(); // after reset(), first element : else next | |
438 Component *post_match_iter(); // after reset(), first element : else next | |
439 void reset(); // Reset iteration | |
440 Component *current(); // return current element in iteration. | |
441 | |
442 // Return element at "position", else NULL | |
443 Component *operator[](int position); | |
444 Component *at(int position) { return (*this)[position]; } | |
445 | |
446 // Return first component having this name. | |
447 const Component *search(const char *name); | |
448 | |
449 // Return number of USEs + number of DEFs | |
450 int num_operands(); | |
451 // Return zero-based position in list; -1 if not in list. | |
6850 | 452 int operand_position(const char *name, int usedef, Form *fm); |
0 | 453 // Find position for this name, regardless of use/def information |
454 int operand_position(const char *name); | |
455 // Find position for this name when looked up for output via "format" | |
6850 | 456 int operand_position_format(const char *name, Form *fm); |
0 | 457 // Find position for the Label when looked up for output via "format" |
458 int label_position(); | |
459 // Find position for the Method when looked up for output via "format" | |
460 int method_position(); | |
461 | |
462 void dump(); // output to stderr | |
463 void output(FILE *fp); // Output list of names to 'fp' | |
464 | |
465 ComponentList(); | |
466 ~ComponentList(); | |
467 }; | |
468 | |
469 //------------------------------SourceForm------------------------------------- | |
470 class SourceForm : public Form { | |
471 private: | |
472 | |
473 public: | |
474 // Public Data | |
475 char *_code; // Buffer for storing code text | |
476 | |
477 // Public Methods | |
478 SourceForm(char* code); | |
479 ~SourceForm(); | |
480 | |
481 virtual const char* classname() { return "SourceForm"; } | |
482 | |
483 void dump(); // Debug printer | |
484 void output(FILE *fp); // Write output files | |
485 }; | |
486 | |
487 class HeaderForm : public SourceForm { | |
488 public: | |
489 HeaderForm(char* code) : SourceForm(code) { } | |
490 | |
491 virtual const char* classname() { return "HeaderForm"; } | |
492 }; | |
493 | |
494 class PreHeaderForm : public SourceForm { | |
495 public: | |
496 PreHeaderForm(char* code) : SourceForm(code) { } | |
497 | |
498 virtual const char* classname() { return "PreHeaderForm"; } | |
499 }; | |
500 | |
501 | |
502 | |
503 | |
504 //------------------------------Expr------------------------------------------ | |
505 #define STRING_BUFFER_LENGTH 2048 | |
506 // class Expr represents integer expressions containing constants and addition | |
507 // Value must be in range zero through maximum positive integer. 32bits. | |
508 // Expected use: instruction and operand costs | |
509 class Expr { | |
510 public: | |
511 enum { | |
512 Zero = 0, | |
513 Max = 0x7fffffff | |
514 }; | |
515 const char *_external_name; // if !NULL, then print this instead of _expr | |
516 const char *_expr; | |
517 int _min_value; | |
518 int _max_value; | |
519 | |
520 Expr(); | |
521 Expr(const char *cost); | |
522 Expr(const char *name, const char *expression, int min_value, int max_value); | |
523 Expr *clone() const; | |
524 | |
525 bool is_unknown() const { return (this == Expr::get_unknown()); } | |
526 bool is_zero() const { return (_min_value == Expr::Zero && _max_value == Expr::Zero); } | |
527 bool less_than_or_equal(const Expr *c) const { return (_max_value <= c->_min_value); } | |
528 | |
529 void add(const Expr *c); | |
530 void add(const char *c); | |
531 void add(const char *c, ArchDesc &AD); // check if 'c' is defined in <arch>.ad | |
532 void set_external_name(const char *name) { _external_name = name; } | |
533 | |
534 const char *as_string() const { return (_external_name != NULL ? _external_name : _expr); } | |
535 void print() const; | |
536 void print_define(FILE *fp) const; | |
537 void print_assert(FILE *fp) const; | |
538 | |
539 static Expr *get_unknown(); // Returns pointer to shared unknown cost instance | |
540 | |
541 static char *buffer() { return &external_buffer[0]; } | |
542 static bool init_buffers(); // Fill buffers with 0 | |
543 static bool check_buffers(); // if buffer use may have overflowed, assert | |
544 | |
545 private: | |
546 static Expr *_unknown_expr; | |
547 static char string_buffer[STRING_BUFFER_LENGTH]; | |
548 static char external_buffer[STRING_BUFFER_LENGTH]; | |
549 static bool _init_buffers; | |
550 const char *compute_expr(const Expr *c1, const Expr *c2); // cost as string after adding 'c1' and 'c2' | |
551 int compute_min (const Expr *c1, const Expr *c2); // minimum after adding 'c1' and 'c2' | |
552 int compute_max (const Expr *c1, const Expr *c2); // maximum after adding 'c1' and 'c2' | |
553 const char *compute_external(const Expr *c1, const Expr *c2); // external name after adding 'c1' and 'c2' | |
554 }; | |
555 | |
556 //------------------------------ExprDict--------------------------------------- | |
557 // Dictionary containing Exprs | |
558 class ExprDict { | |
559 private: | |
560 Dict _expr; // map names, char*, to their Expr* or NULL | |
561 NameList _defines; // record the order of definitions entered with define call | |
562 | |
563 // Disable public use of constructor, copy-ctor, operator =, operator == | |
564 ExprDict( ); | |
565 ExprDict( const ExprDict & ); // Deep-copy guts | |
566 ExprDict &operator =( const ExprDict & ); | |
567 // == compares two dictionaries; they must have the same keys (their keys | |
568 // must match using CmpKey) and they must have the same values (pointer | |
569 // comparison). If so 1 is returned, if not 0 is returned. | |
570 bool operator ==(const ExprDict &d) const; // Compare dictionaries for equal | |
571 | |
572 public: | |
573 // cmp is a key comparision routine. hash is a routine to hash a key. | |
574 ExprDict( CmpKey cmp, Hash hash, Arena *arena ); | |
575 ~ExprDict(); | |
576 | |
577 // Return # of key-value pairs in dict | |
578 int Size(void) const; | |
579 | |
580 // define inserts the given key-value pair into the dictionary, | |
581 // and records the name in order for later output, ... | |
582 const Expr *define(const char *name, Expr *expr); | |
583 | |
584 // Insert inserts the given key-value pair into the dictionary. The prior | |
585 // value of the key is returned; NULL if the key was not previously defined. | |
586 const Expr *Insert(const char *name, Expr *expr); // A new key-value | |
587 | |
588 // Find finds the value of a given key; or NULL if not found. | |
589 // The dictionary is NOT changed. | |
590 const Expr *operator [](const char *name) const; // Do a lookup | |
591 | |
592 void print_defines(FILE *fp); | |
593 void print_asserts(FILE *fp); | |
594 void dump(); | |
595 }; | |
1972 | 596 |
597 #endif // SHARE_VM_ADLC_FORMS_HPP |