1 /*
2 * Copyright (c) 1998, 2019, 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_ADLC_FORMSOPT_HPP
26 #define SHARE_ADLC_FORMSOPT_HPP
27
28 // FORMSOPT.HPP - ADL Parser Target Specific Optimization Forms Classes
29
30 // Class List
31 class Form;
32 class InstructForm;
33 class OperandForm;
34 class OpClassForm;
35 class AttributeForm;
36 class RegisterForm;
37 class PipelineForm;
38 class SourceForm;
39 class EncodeForm;
40 class Component;
41 class Constraint;
42 class Predicate;
43 class MatchRule;
44 class Attribute;
45 class Effect;
46 class ExpandRule;
47 class RewriteRule;
48 class ConstructRule;
49 class FormatRule;
50 class Peephole;
51 class PeepMatch;
52 class PeepConstraint;
53 class EncClass;
54 class Interface;
55 class RegInterface;
56 class ConstInterface;
57 class MemInterface;
58 class CondInterface;
59 class Opcode;
60 class InsEncode;
61 class RegDef;
62 class RegClass;
63 class CodeSnippetRegClass;
64 class ConditionalRegClass;
65 class AllocClass;
66 class ResourceForm;
67 class PipeClassForm;
68 class PipeClassOperandForm;
69 class PipeClassResourceForm;
70 class PeepMatch;
71 class PeepConstraint;
72 class PeepReplace;
73 class MatchList;
74
75 class ArchDesc;
76
77 //==============================Register Allocation============================
78 //------------------------------RegisterForm-----------------------------------
79 class RegisterForm : public Form {
80 private:
81 AllocClass *_current_ac; // State used by iter_RegDefs()
82
83 public:
84 // Public Data
85 NameList _rdefs; // List of register definition names
86 Dict _regDef; // map register name to RegDef*
87
88 NameList _rclasses; // List of register class names
89 Dict _regClass; // map register class name to RegClass*
90
91 NameList _aclasses; // List of allocation class names
92 Dict _allocClass; // Dictionary of allocation classes
93
94 static int _reg_ctr; // Register counter
95 static int RegMask_Size(); // Compute RegMask size
96
97 // Public Methods
98 RegisterForm();
99 ~RegisterForm();
100
101 void addRegDef(char *regName, char *callingConv, char *c_conv,
102 char * idealtype, char *encoding, char* concreteName);
103 template<typename T> T* addRegClass(const char* className);
104
105 AllocClass *addAllocClass(char *allocName);
106 void addSpillRegClass();
107
108 // Provide iteration over all register definitions
109 // in the order used by the register allocator
110 void reset_RegDefs();
111 RegDef *iter_RegDefs();
112 RegDef *getRegDef (const char *regName);
113
114 RegClass *getRegClass(const char *className);
115
116 // Return register mask, compressed chunk and register #
117 uint reg_mask(char *register_class);
118
119 // Check that register classes are compatible with chunks
120 bool verify();
121
122 void dump(); // Debug printer
123 void output(FILE *fp); // Write info to output files
124 };
125
126 //------------------------------RegDef-----------------------------------------
127 class RegDef : public Form {
128 public:
129 // Public Data
130 const char *_regname; // ADLC (Opto) Register name
131 const char *_callconv; // Calling convention
132 const char *_c_conv; // Native calling convention, 'C'
133 const char *_idealtype; // Ideal Type for register save/restore
134 const char *_concrete; // concrete register name
135
136 private:
137 const char *_register_encode; // The register encoding
138 // The chunk and register mask bits define info for register allocation
139 uint32 _register_num; // Which register am I
140
141 public:
142 // Public Methods
143 RegDef(char *regname, char *callconv, char *c_conv,
144 char *idealtype, char *encoding, char *concrete);
145 ~RegDef(); // Destructor
146
147 // Interface to define/redefine the register number
148 void set_register_num(uint32 new_register_num);
149
150 // Bit pattern used for generating machine code
151 const char *register_encode() const;
152 // Register number used in machine-independent code
153 uint32 register_num() const;
154
155 void dump(); // Debug printer
156 void output(FILE *fp); // Write info to output files
157 };
158
159 //------------------------------RegClass---------------------------------------
160 // Generic register class. This register class is the internal representation
161 // for the following .ad file format:
162 //
163 // reg_class ptr(RAX, RBX, ...);
164 //
165 // where ptr is the name of the register class, RAX and RBX are registers.
166 //
167 // This register class allows registers to be spilled onto the stack. Spilling
168 // is allowed is field _stack_or_reg is true.
169 class RegClass : public Form {
170 public:
171 // Public Data
172 const char *_classid; // Name of class
173 NameList _regDefs; // List of registers in class
174 Dict _regDef; // Dictionary of registers in class
175 protected:
176 bool _stack_or_reg; // Allowed on any stack slot
177
178 public:
179 // Public Methods
180 RegClass(const char *classid);// Constructor
181 virtual ~RegClass();
182
183 void addReg(RegDef *regDef); // Add a register to this class
184
185 uint size() const; // Number of registers in class
186 int regs_in_word( int wordnum, bool stack_also );
187
188 const RegDef *get_RegDef(const char *regDef_name) const;
189
190 // Returns the lowest numbered register in the mask.
191 const RegDef* find_first_elem();
192
193 // Iteration support
194 void reset(); // Reset the following two iterators
195 RegDef *RegDef_iter(); // which move jointly,
196 const char *rd_name_iter(); // invoking either advances both.
197
198 void dump(); // Debug printer
199 void output(FILE *fp); // Write info to output files
200
201 virtual bool has_stack_version() {
202 return _stack_or_reg;
203 }
204 virtual void set_stack_version(bool flag) {
205 _stack_or_reg = flag;
206 }
207
208 virtual void declare_register_masks(FILE* fp);
209 virtual void build_register_masks(FILE* fp);
210 };
211
212 //------------------------------CodeSnippetRegClass----------------------------
213 // Register class that has an user-defined C++ code snippet attached to it
214 // to determine at runtime which register class to use. This register class is
215 // the internal representation for the following .ad file format:
216 //
217 // reg_class actual_dflt_reg %{
218 // if (VM_Version::has_vfp3_32()) {
219 // return DFLT_REG_mask();
220 // } else {
221 // return DFLT_LOW_REG_mask();
222 // }
223 // %}
224 //
225 // where DFLT_REG_mask() and DFLT_LOW_REG_mask() are the internal names of the
226 // masks of register classes dflt_reg and dflt_low_reg.
227 //
228 // The attached code snippet can select also between more than two register classes.
229 // This register class can be, however, used only if the register class is not
230 // cisc-spillable (i.e., the registers of this class are not allowed on the stack,
231 // which is equivalent with _stack_or_reg being false).
232 class CodeSnippetRegClass : public RegClass {
233 protected:
234 char* _code_snippet;
235 public:
236 CodeSnippetRegClass(const char* classid);// Constructor
237 ~CodeSnippetRegClass();
238
239 void set_code_snippet(char* code) {
240 _code_snippet = code;
241 }
242 char* code_snippet() {
243 return _code_snippet;
244 }
245 void declare_register_masks(FILE* fp);
246 void build_register_masks(FILE* fp) {
247 // We do not need to generate register masks because we select at runtime
248 // between register masks generated for other register classes.
249 return;
250 }
251 };
252
253 //------------------------------ConditionalRegClass----------------------------
254 // Register class that has two register classes and a runtime condition attached
255 // to it. The condition is evaluated at runtime and either one of the register
256 // attached register classes is selected. This register class is the internal
257 // representation for the following .ad format:
258 //
259 // reg_class_dynamic actual_dflt_reg(dflt_reg, low_reg,
260 // %{ VM_Version::has_vfp3_32() }%
261 // );
262 //
263 // This example is equivalent to the example used with the CodeSnippetRegClass
264 // register class. A ConditionalRegClass works also if a register class is cisc-spillable
265 // (i.e., _stack_or_reg is true), but if can select only between two register classes.
266 class ConditionalRegClass : public RegClass {
267 protected:
268 // reference to condition code
269 char* _condition_code; // C++ condition code to dynamically determine which register class to use.
270
271 // Example syntax (equivalent to previous example):
272 //
273 // reg_class actual_dflt_reg(dflt_reg, low_reg,
274 // %{ VM_Version::has_vfp3_32() }%
275 // );
276 // reference to conditional register classes
277 RegClass* _rclasses[2]; // 0 is the register class selected if the condition code returns true
278 // 1 is the register class selected if the condition code returns false
279 public:
280 ConditionalRegClass(const char* classid);// Constructor
281 ~ConditionalRegClass();
282
283 virtual void set_stack_version(bool flag) {
284 RegClass::set_stack_version(flag);
285 assert((_rclasses[0] != NULL), "Register class NULL for condition code == true");
286 assert((_rclasses[1] != NULL), "Register class NULL for condition code == false");
287 _rclasses[0]->set_stack_version(flag);
288 _rclasses[1]->set_stack_version(flag);
289 }
290 void declare_register_masks(FILE* fp);
291 void build_register_masks(FILE* fp) {
292 // We do not need to generate register masks because we select at runtime
293 // between register masks generated for other register classes.
294 return;
295 }
296 void set_rclass_at_index(int index, RegClass* rclass) {
297 assert((0 <= index && index < 2), "Condition code can select only between two register classes");
298 _rclasses[index] = rclass;
299 }
300 void set_condition_code(char* code) {
301 _condition_code = code;
302 }
303 char* condition_code() {
304 return _condition_code;
305 }
306 };
307
308 //------------------------------AllocClass-------------------------------------
309 class AllocClass : public Form {
310 private:
311
312 public:
313 // Public Data
314 char *_classid; // Name of class
315 NameList _regDefs; // List of registers in class
316 Dict _regDef; // Dictionary of registers in class
317
318 // Public Methods
319 AllocClass(char *classid); // Constructor
320
321 void addReg(RegDef *regDef); // Add a register to this class
322 uint size() {return _regDef.Size();} // Number of registers in class
323
324 void dump(); // Debug printer
325 void output(FILE *fp); // Write info to output files
326 };
327
328
329 //==============================Frame Handling================================
330 //------------------------------FrameForm-------------------------------------
331 class FrameForm : public Form {
332 private:
333
334 public:
335 // Public Data
336 bool _direction; // Direction of stack growth
337 char *_sync_stack_slots;
338 char *_inline_cache_reg;
339 char *_interpreter_method_oop_reg;
340 char *_interpreter_frame_pointer_reg;
341 char *_cisc_spilling_operand_name;
342 char *_frame_pointer;
343 char *_c_frame_pointer;
344 char *_alignment;
345 bool _return_addr_loc;
346 bool _c_return_addr_loc;
347 char *_return_addr;
348 char *_c_return_addr;
349 char *_in_preserve_slots;
350 char *_varargs_C_out_slots_killed;
351 char *_calling_convention;
352 char *_c_calling_convention;
353 char *_return_value;
354 char *_c_return_value;
355
356 // Public Methods
357 FrameForm();
358 ~FrameForm();
359
360 void dump(); // Debug printer
361 void output(FILE *fp); // Write info to output files
362 };
363
364
365 //==============================Scheduling=====================================
366 //------------------------------PipelineForm-----------------------------------
367 class PipelineForm : public Form {
368 private:
369
370 public:
371 // Public Data
372 NameList _reslist; // List of pipeline resources
373 FormDict _resdict; // Resource Name -> ResourceForm mapping
374 int _rescount; // Number of resources (ignores OR cases)
375 int _maxcycleused; // Largest cycle used relative to beginning of instruction
376
377 NameList _stages; // List of pipeline stages on architecture
378 int _stagecnt; // Number of stages listed
379
380 NameList _classlist; // List of pipeline classes
381 FormDict _classdict; // Class Name -> PipeClassForm mapping
382 int _classcnt; // Number of classes
383
384 NameList _noplist; // List of NOP instructions
385 int _nopcnt; // Number of nop instructions
386
387 bool _variableSizeInstrs; // Indicates if this architecture has variable sized instructions
388 bool _branchHasDelaySlot; // Indicates that branches have delay slot instructions
389 int _maxInstrsPerBundle; // Indicates the maximum number of instructions for ILP
390 int _maxBundlesPerCycle; // Indicates the maximum number of bundles for ILP
391 int _instrUnitSize; // The minimum instruction unit size, in bytes
392 int _bundleUnitSize; // The bundle unit size, in bytes
393 int _instrFetchUnitSize; // The size of the I-fetch unit, in bytes [must be power of 2]
394 int _instrFetchUnits; // The number of I-fetch units processed per cycle
395
396 // Public Methods
397 PipelineForm();
398 ~PipelineForm();
399
400 void dump(); // Debug printer
401 void output(FILE *fp); // Write info to output files
402 };
403
404 //------------------------------ResourceForm-----------------------------------
405 class ResourceForm : public Form {
406 public:
407 unsigned mask() const { return _resmask; };
408
409 private:
410 // Public Data
411 unsigned _resmask; // Resource Mask (OR of resource specifier bits)
412
413 public:
414
415 // Virtual Methods
416 virtual ResourceForm *is_resource() const;
417
418 // Public Methods
419 ResourceForm(unsigned resmask); // Constructor
420 ~ResourceForm(); // Destructor
421
422 void dump(); // Debug printer
423 void output(FILE *fp); // Write info to output files
424 };
425
426 //------------------------------PipeClassOperandForm-----------------------------
427 class PipeClassOperandForm : public Form {
428 private:
429
430 public:
431 // Public Data
432 const char *_stage; // Name of Stage
433 unsigned _iswrite; // Read or Write
434 unsigned _more_instrs; // Additional Instructions
435
436 // Public Methods
437 PipeClassOperandForm(const char *stage, unsigned iswrite, unsigned more_instrs)
438 : _stage(stage)
439 , _iswrite(iswrite)
440 , _more_instrs(more_instrs)
441 {};
442
443 ~PipeClassOperandForm() {}; // Destructor
444
445 bool isWrite() const { return _iswrite != 0; }
446
447 void dump(); // Debug printer
448 void output(FILE *fp); // Write info to output files
449 };
450
451 //------------------------------PipeClassResourceForm--------------------------
452 class PipeClassResourceForm : public Form {
453 private:
454
455 public:
456 // Public Data
457 const char *_resource; // Resource
458 const char *_stage; // Stage the resource is used in
459 int _cycles; // Number of cycles the resource is used
460
461 // Public Methods
462 PipeClassResourceForm(const char *resource, const char *stage, int cycles)
463 // Constructor
464 : _resource(resource)
465 , _stage(stage)
466 , _cycles(cycles)
467 {};
468
469 ~PipeClassResourceForm() {}; // Destructor
470
471 void dump(); // Debug printer
472 void output(FILE *fp); // Write info to output files
473 };
474
475 //------------------------------PipeClassForm----------------------------------
476 class PipeClassForm : public Form {
477 private:
478
479 public:
480
481 // Public Data
482 const char *_ident; // Name of class
483 int _num; // Used in name of MachNode subclass
484 NameList _parameters; // Locally defined names
485 FormDict _localNames; // Table of operands & their types
486 FormDict _localUsage; // Table of operand usage
487 FormList _resUsage; // List of resource usage
488 NameList _instructs; // List of instructions and machine nodes that use this pipeline class
489 bool _has_fixed_latency; // Always takes this number of cycles
490 int _fixed_latency; // Always takes this number of cycles
491 int _instruction_count; // Number of instructions in first bundle
492 bool _has_multiple_bundles; // Indicates if 1 or multiple bundles
493 bool _has_branch_delay_slot; // Has branch delay slot as last instruction
494 bool _force_serialization; // This node serializes relative to surrounding nodes
495 bool _may_have_no_code; // This node may generate no code based on register allocation
496
497 // Virtual Methods
498 virtual PipeClassForm *is_pipeclass() const;
499
500 // Public Methods
501 PipeClassForm(const char *id, int num);
502 // Constructor
503 ~PipeClassForm(); // Destructor
504
505 bool hasFixedLatency() { return _has_fixed_latency; }
506 int fixedLatency() { return _fixed_latency; }
507
508 void setFixedLatency(int fixed_latency) { _has_fixed_latency = 1; _fixed_latency = fixed_latency; }
509
510 void setInstructionCount(int i) { _instruction_count = i; }
511 void setMultipleBundles(bool b) { _has_multiple_bundles = b; }
512 void setBranchDelay(bool s) { _has_branch_delay_slot = s; }
513 void setForceSerialization(bool s) { _force_serialization = s; }
514 void setMayHaveNoCode(bool s) { _may_have_no_code = s; }
515
516 int InstructionCount() const { return _instruction_count; }
517 bool hasMultipleBundles() const { return _has_multiple_bundles; }
518 bool hasBranchDelay() const { return _has_branch_delay_slot; }
519 bool forceSerialization() const { return _force_serialization; }
520 bool mayHaveNoCode() const { return _may_have_no_code; }
521
522 void dump(); // Debug printer
523 void output(FILE *fp); // Write info to output files
524 };
525
526
527 //==============================Peephole Optimization==========================
528 //------------------------------Peephole---------------------------------------
529 class Peephole : public Form {
530 private:
531 static int _peephole_counter;// Incremented by each peephole rule parsed
532 int _peephole_number;// Remember my order in architecture description
533 PeepMatch *_match; // Instruction pattern to match
534 PeepConstraint *_constraint; // List of additional constraints
535 PeepReplace *_replace; // Instruction pattern to substitute in
536
537 Peephole *_next;
538
539 public:
540 // Public Methods
541 Peephole();
542 ~Peephole();
543
544 // Append a peephole rule with the same root instruction
545 void append_peephole(Peephole *next_peephole);
546
547 // Store the components of this peephole rule
548 void add_match(PeepMatch *only_one_match);
549 void append_constraint(PeepConstraint *next_constraint);
550 void add_replace(PeepReplace *only_one_replacement);
551
552 // Access the components of this peephole rule
553 int peephole_number() { return _peephole_number; }
554 PeepMatch *match() { return _match; }
555 PeepConstraint *constraints() { return _constraint; }
556 PeepReplace *replacement() { return _replace; }
557 Peephole *next() { return _next; }
558
559 void dump(); // Debug printer
560 void output(FILE *fp); // Write info to output files
561 };
562
563
564 class PeepMatch : public Form {
565 private:
566 char *_rule;
567 // NameList _depth; // Depth of this instruction
568 NameList _parent;
569 NameList _position;
570 NameList _instrs; // List of instructions in match rule
571 NameList _input; // input position in parent's instruction
572 int _max_position;
573
574 public:
575 // Public Methods
576 PeepMatch(char *rule);
577 ~PeepMatch();
578
579 // Insert info into the match-rule
580 void add_instruction(int parent, int position, const char *name, int input);
581
582 // Access info about instructions in the peep-match rule
583 int max_position();
584 const char *instruction_name(int position);
585 // Iterate through all info on matched instructions
586 void reset();
587 void next_instruction(int &parent, int &position, const char* &name, int &input);
588 // 'true' if current position in iteration is a placeholder, not matched.
589 bool is_placeholder();
590
591 void dump();
592 void output(FILE *fp);
593 };
594
595
596 class PeepConstraint : public Form {
597 private:
598 PeepConstraint *_next; // Additional constraints ANDed together
599
600 public:
601 const int _left_inst;
602 const char* _left_op;
603 const char* _relation;
604 const int _right_inst;
605 const char* _right_op;
606
607 public:
608 // Public Methods
609 PeepConstraint(int left_inst, char* left_op, char* relation,
610 int right_inst, char* right_op);
611 ~PeepConstraint();
612
613 // Check if constraints use instruction at position
614 bool constrains_instruction(int position);
615
616 // Add another constraint
617 void append(PeepConstraint *next_peep_constraint);
618 // Access the next constraint in the list
619 PeepConstraint *next();
620
621 void dump();
622 void output(FILE *fp);
623 };
624
625
626 class PeepReplace : public Form {
627 private:
628 char *_rule;
629 NameList _instruction;
630 NameList _operand_inst_num;
631 NameList _operand_op_name;
632
633 public:
634
635 // Public Methods
636 PeepReplace(char *rule);
637 ~PeepReplace();
638
639 // Add contents of peepreplace
640 void add_instruction(char *root);
641 void add_operand( int inst_num, char *inst_operand );
642
643 // Access contents of peepreplace
644 void reset();
645 void next_instruction(const char * &root);
646 void next_operand(int &inst_num, const char * &inst_operand );
647
648 // Utilities
649 void dump();
650 void output(FILE *fp);
651 };
652
653
654 class PeepChild : public Form {
655 public:
656 const int _inst_num; // Number of instruction (-1 if only named)
657 const char *_inst_op; // Instruction's operand, NULL if number == -1
658 const char *_inst_name; // Name of the instruction
659
660 public:
661 PeepChild(char *inst_name)
662 : _inst_num(-1), _inst_op(NULL), _inst_name(inst_name) {};
663 PeepChild(int inst_num, char *inst_op, char *inst_name)
664 : _inst_num(inst_num), _inst_op(inst_op), _inst_name(inst_name) {};
665 ~PeepChild();
666
667 bool use_leaf_operand() { return _inst_num != -1; };
668 bool generate_an_instruction() { return _inst_num == -1; }
669
670 void dump();
671 void output(FILE *fp);
672 };
673
674 #endif // SHARE_ADLC_FORMSOPT_HPP