1 /*
2 * Copyright (c) 1998, 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 // FORMS.CPP - Definitions for ADL Parser Forms Classes
26 #include "adlc.hpp"
27
28 //==============================Register Allocation============================
29 int RegisterForm::_reg_ctr = 0;
30
31 //------------------------------RegisterForm-----------------------------------
32 // Constructor
RegisterForm()33 RegisterForm::RegisterForm()
34 : _regDef(cmpstr,hashstr, Form::arena),
35 _regClass(cmpstr,hashstr, Form::arena),
36 _allocClass(cmpstr,hashstr, Form::arena) {
37 }
~RegisterForm()38 RegisterForm::~RegisterForm() {
39 }
40
41 // record a new register definition
addRegDef(char * name,char * callingConv,char * c_conv,char * idealtype,char * encoding,char * concrete)42 void RegisterForm::addRegDef(char *name, char *callingConv, char *c_conv,
43 char *idealtype, char *encoding, char* concrete) {
44 RegDef *regDef = new RegDef(name, callingConv, c_conv, idealtype, encoding, concrete);
45 _rdefs.addName(name);
46 _regDef.Insert(name,regDef);
47 }
48
49 // record a new register class
50 template <typename T>
addRegClass(const char * className)51 T* RegisterForm::addRegClass(const char* className) {
52 T* regClass = new T(className);
53 _rclasses.addName(className);
54 _regClass.Insert(className, regClass);
55 return regClass;
56 }
57
58 // Explicit instantiation for all supported register classes.
59 template RegClass* RegisterForm::addRegClass<RegClass>(const char* className);
60 template CodeSnippetRegClass* RegisterForm::addRegClass<CodeSnippetRegClass>(const char* className);
61 template ConditionalRegClass* RegisterForm::addRegClass<ConditionalRegClass>(const char* className);
62
63 // record a new register class
addAllocClass(char * className)64 AllocClass *RegisterForm::addAllocClass(char *className) {
65 AllocClass *allocClass = new AllocClass(className);
66 _aclasses.addName(className);
67 _allocClass.Insert(className,allocClass);
68 return allocClass;
69 }
70
71 // Called after parsing the Register block. Record the register class
72 // for spill-slots/regs.
addSpillRegClass()73 void RegisterForm::addSpillRegClass() {
74 // Stack slots start at the next available even register number.
75 _reg_ctr = (_reg_ctr+7) & ~7;
76 const char *rc_name = "stack_slots";
77 RegClass* reg_class = new RegClass(rc_name);
78 reg_class->set_stack_version(true);
79 _rclasses.addName(rc_name);
80 _regClass.Insert(rc_name,reg_class);
81 }
82
83
84 // Provide iteration over all register definitions
85 // in the order used by the register allocator
reset_RegDefs()86 void RegisterForm::reset_RegDefs() {
87 _current_ac = NULL;
88 _aclasses.reset();
89 }
90
iter_RegDefs()91 RegDef *RegisterForm::iter_RegDefs() {
92 // Check if we need to get the next AllocClass
93 if ( _current_ac == NULL ) {
94 const char *ac_name = _aclasses.iter();
95 if( ac_name == NULL ) return NULL; // No more allocation classes
96 _current_ac = (AllocClass*)_allocClass[ac_name];
97 _current_ac->_regDefs.reset();
98 assert( _current_ac != NULL, "Name must match an allocation class");
99 }
100
101 const char *rd_name = _current_ac->_regDefs.iter();
102 if( rd_name == NULL ) {
103 // At end of this allocation class, check the next
104 _current_ac = NULL;
105 return iter_RegDefs();
106 }
107 RegDef *reg_def = (RegDef*)_current_ac->_regDef[rd_name];
108 assert( reg_def != NULL, "Name must match a register definition");
109 return reg_def;
110 }
111
112 // return the register definition with name 'regName'
getRegDef(const char * regName)113 RegDef *RegisterForm::getRegDef(const char *regName) {
114 RegDef *regDef = (RegDef*)_regDef[regName];
115 return regDef;
116 }
117
118 // return the register class with name 'className'
getRegClass(const char * className)119 RegClass *RegisterForm::getRegClass(const char *className) {
120 RegClass *regClass = (RegClass*)_regClass[className];
121 return regClass;
122 }
123
124
125 // Check that register classes are compatible with chunks
verify()126 bool RegisterForm::verify() {
127 bool valid = true;
128
129 // Verify Register Classes
130 // check that each register class contains registers from one chunk
131 const char *rc_name = NULL;
132 _rclasses.reset();
133 while ( (rc_name = _rclasses.iter()) != NULL ) {
134 // Check the chunk value for all registers in this class
135 RegClass *reg_class = getRegClass(rc_name);
136 assert( reg_class != NULL, "InternalError() no matching register class");
137 } // end of RegClasses
138
139 // Verify that every register has been placed into an allocation class
140 RegDef *reg_def = NULL;
141 reset_RegDefs();
142 uint num_register_zero = 0;
143 while ( (reg_def = iter_RegDefs()) != NULL ) {
144 if( reg_def->register_num() == 0 ) ++num_register_zero;
145 }
146 if( num_register_zero > 1 ) {
147 fprintf(stderr,
148 "ERROR: More than one register has been assigned register-number 0.\n"
149 "Probably because a register has not been entered into an allocation class.\n");
150 }
151
152 return valid;
153 }
154
155 // Compute RegMask size
RegMask_Size()156 int RegisterForm::RegMask_Size() {
157 // Need at least this many words
158 int words_for_regs = (_reg_ctr + 31)>>5;
159 // The array of Register Mask bits should be large enough to cover
160 // all the machine registers and all parameters that need to be passed
161 // on the stack (stack registers) up to some interesting limit. Methods
162 // that need more parameters will NOT be compiled. On Intel, the limit
163 // is something like 90+ parameters.
164 // Add a few (3 words == 96 bits) for incoming & outgoing arguments to calls.
165 // Round up to the next doubleword size.
166 return (words_for_regs + 3 + 1) & ~1;
167 }
168
dump()169 void RegisterForm::dump() { // Debug printer
170 output(stderr);
171 }
172
output(FILE * fp)173 void RegisterForm::output(FILE *fp) { // Write info to output files
174 const char *name;
175 fprintf(fp,"\n");
176 fprintf(fp,"-------------------- Dump RegisterForm --------------------\n");
177 for(_rdefs.reset(); (name = _rdefs.iter()) != NULL;) {
178 ((RegDef*)_regDef[name])->output(fp);
179 }
180 fprintf(fp,"\n");
181 for (_rclasses.reset(); (name = _rclasses.iter()) != NULL;) {
182 ((RegClass*)_regClass[name])->output(fp);
183 }
184 fprintf(fp,"\n");
185 for (_aclasses.reset(); (name = _aclasses.iter()) != NULL;) {
186 ((AllocClass*)_allocClass[name])->output(fp);
187 }
188 fprintf(fp,"-------------------- end RegisterForm --------------------\n");
189 }
190
191 //------------------------------RegDef-----------------------------------------
192 // Constructor
RegDef(char * regname,char * callconv,char * c_conv,char * idealtype,char * encode,char * concrete)193 RegDef::RegDef(char *regname, char *callconv, char *c_conv, char * idealtype, char * encode, char * concrete)
194 : _regname(regname), _callconv(callconv), _c_conv(c_conv),
195 _idealtype(idealtype),
196 _register_encode(encode),
197 _concrete(concrete),
198 _register_num(0) {
199
200 // Chunk and register mask are determined by the register number
201 // _register_num is set when registers are added to an allocation class
202 }
~RegDef()203 RegDef::~RegDef() { // Destructor
204 }
205
set_register_num(uint32 register_num)206 void RegDef::set_register_num(uint32 register_num) {
207 _register_num = register_num;
208 }
209
210 // Bit pattern used for generating machine code
register_encode() const211 const char* RegDef::register_encode() const {
212 return _register_encode;
213 }
214
215 // Register number used in machine-independent code
register_num() const216 uint32 RegDef::register_num() const {
217 return _register_num;
218 }
219
dump()220 void RegDef::dump() {
221 output(stderr);
222 }
223
output(FILE * fp)224 void RegDef::output(FILE *fp) { // Write info to output files
225 fprintf(fp,"RegDef: %s (%s) encode as %s using number %d\n",
226 _regname, (_callconv?_callconv:""), _register_encode, _register_num);
227 fprintf(fp,"\n");
228 }
229
230
231 //------------------------------RegClass---------------------------------------
232 // Construct a register class into which registers will be inserted
RegClass(const char * classid)233 RegClass::RegClass(const char* classid) : _stack_or_reg(false), _classid(classid), _regDef(cmpstr, hashstr, Form::arena) {
234 }
235
~RegClass()236 RegClass::~RegClass() {
237 delete _classid;
238 }
239
240 // record a register in this class
addReg(RegDef * regDef)241 void RegClass::addReg(RegDef *regDef) {
242 _regDefs.addName(regDef->_regname);
243 _regDef.Insert((void*)regDef->_regname, regDef);
244 }
245
246 // Number of registers in class
size() const247 uint RegClass::size() const {
248 return _regDef.Size();
249 }
250
get_RegDef(const char * rd_name) const251 const RegDef *RegClass::get_RegDef(const char *rd_name) const {
252 return (const RegDef*)_regDef[rd_name];
253 }
254
reset()255 void RegClass::reset() {
256 _regDefs.reset();
257 }
258
rd_name_iter()259 const char *RegClass::rd_name_iter() {
260 return _regDefs.iter();
261 }
262
RegDef_iter()263 RegDef *RegClass::RegDef_iter() {
264 const char *rd_name = rd_name_iter();
265 RegDef *reg_def = rd_name ? (RegDef*)_regDef[rd_name] : NULL;
266 return reg_def;
267 }
268
find_first_elem()269 const RegDef* RegClass::find_first_elem() {
270 const RegDef* first = NULL;
271 const RegDef* def = NULL;
272
273 reset();
274 while ((def = RegDef_iter()) != NULL) {
275 if (first == NULL || def->register_num() < first->register_num()) {
276 first = def;
277 }
278 }
279
280 assert(first != NULL, "empty mask?");
281 return first;;
282 }
283
284 // Collect all the registers in this register-word. One bit per register.
regs_in_word(int wordnum,bool stack_also)285 int RegClass::regs_in_word( int wordnum, bool stack_also ) {
286 int word = 0;
287 const char *name;
288 for(_regDefs.reset(); (name = _regDefs.iter()) != NULL;) {
289 int rnum = ((RegDef*)_regDef[name])->register_num();
290 if( (rnum >> 5) == wordnum )
291 word |= (1 << (rnum & 31));
292 }
293 if( stack_also ) {
294 // Now also collect stack bits
295 for( int i = 0; i < 32; i++ )
296 if( wordnum*32+i >= RegisterForm::_reg_ctr )
297 word |= (1 << i);
298 }
299
300 return word;
301 }
302
dump()303 void RegClass::dump() {
304 output(stderr);
305 }
306
output(FILE * fp)307 void RegClass::output(FILE *fp) { // Write info to output files
308 fprintf(fp,"RegClass: %s\n",_classid);
309 const char *name;
310 for(_regDefs.reset(); (name = _regDefs.iter()) != NULL;) {
311 ((RegDef*)_regDef[name])->output(fp);
312 }
313 fprintf(fp,"--- done with entries for reg_class %s\n\n",_classid);
314 }
315
declare_register_masks(FILE * fp)316 void RegClass::declare_register_masks(FILE* fp) {
317 const char* prefix = "";
318 const char* rc_name_to_upper = toUpper(_classid);
319 fprintf(fp, "extern const RegMask _%s%s_mask;\n", prefix, rc_name_to_upper);
320 fprintf(fp, "inline const RegMask &%s%s_mask() { return _%s%s_mask; }\n", prefix, rc_name_to_upper, prefix, rc_name_to_upper);
321 if (_stack_or_reg) {
322 fprintf(fp, "extern const RegMask _%sSTACK_OR_%s_mask;\n", prefix, rc_name_to_upper);
323 fprintf(fp, "inline const RegMask &%sSTACK_OR_%s_mask() { return _%sSTACK_OR_%s_mask; }\n", prefix, rc_name_to_upper, prefix, rc_name_to_upper);
324 }
325 delete[] rc_name_to_upper;
326 }
327
build_register_masks(FILE * fp)328 void RegClass::build_register_masks(FILE* fp) {
329 int len = RegisterForm::RegMask_Size();
330 const char *prefix = "";
331 const char* rc_name_to_upper = toUpper(_classid);
332 fprintf(fp, "const RegMask _%s%s_mask(", prefix, rc_name_to_upper);
333
334 int i;
335 for(i = 0; i < len - 1; i++) {
336 fprintf(fp," 0x%x,", regs_in_word(i, false));
337 }
338 fprintf(fp," 0x%x );\n", regs_in_word(i, false));
339
340 if (_stack_or_reg) {
341 fprintf(fp, "const RegMask _%sSTACK_OR_%s_mask(", prefix, rc_name_to_upper);
342 for(i = 0; i < len - 1; i++) {
343 fprintf(fp," 0x%x,", regs_in_word(i, true));
344 }
345 fprintf(fp," 0x%x );\n", regs_in_word(i, true));
346 }
347 delete[] rc_name_to_upper;
348 }
349
350 //------------------------------CodeSnippetRegClass---------------------------
CodeSnippetRegClass(const char * classid)351 CodeSnippetRegClass::CodeSnippetRegClass(const char* classid) : RegClass(classid), _code_snippet(NULL) {
352 }
353
~CodeSnippetRegClass()354 CodeSnippetRegClass::~CodeSnippetRegClass() {
355 delete _code_snippet;
356 }
357
declare_register_masks(FILE * fp)358 void CodeSnippetRegClass::declare_register_masks(FILE* fp) {
359 const char* prefix = "";
360 const char* rc_name_to_upper = toUpper(_classid);
361 fprintf(fp, "inline const RegMask &%s%s_mask() { %s }\n", prefix, rc_name_to_upper, _code_snippet);
362 delete[] rc_name_to_upper;
363 }
364
365 //------------------------------ConditionalRegClass---------------------------
ConditionalRegClass(const char * classid)366 ConditionalRegClass::ConditionalRegClass(const char *classid) : RegClass(classid), _condition_code(NULL) {
367 }
368
~ConditionalRegClass()369 ConditionalRegClass::~ConditionalRegClass() {
370 delete _condition_code;
371 }
372
declare_register_masks(FILE * fp)373 void ConditionalRegClass::declare_register_masks(FILE* fp) {
374 const char* prefix = "";
375 const char* rc_name_to_upper = toUpper(_classid);
376 const char* rclass_0_to_upper = toUpper(_rclasses[0]->_classid);
377 const char* rclass_1_to_upper = toUpper(_rclasses[1]->_classid);
378 fprintf(fp, "inline const RegMask &%s%s_mask() {"
379 " return (%s) ?"
380 " %s%s_mask() :"
381 " %s%s_mask(); }\n",
382 prefix, rc_name_to_upper,
383 _condition_code,
384 prefix, rclass_0_to_upper,
385 prefix, rclass_1_to_upper);
386 if (_stack_or_reg) {
387 fprintf(fp, "inline const RegMask &%sSTACK_OR_%s_mask() {"
388 " return (%s) ?"
389 " %sSTACK_OR_%s_mask() :"
390 " %sSTACK_OR_%s_mask(); }\n",
391 prefix, rc_name_to_upper,
392 _condition_code,
393 prefix, rclass_0_to_upper,
394 prefix, rclass_1_to_upper);
395 }
396 delete[] rc_name_to_upper;
397 delete[] rclass_0_to_upper;
398 delete[] rclass_1_to_upper;
399 return;
400 }
401
402 //------------------------------AllocClass-------------------------------------
AllocClass(char * classid)403 AllocClass::AllocClass(char *classid) : _classid(classid), _regDef(cmpstr,hashstr, Form::arena) {
404 }
405
406 // record a register in this class
addReg(RegDef * regDef)407 void AllocClass::addReg(RegDef *regDef) {
408 assert( regDef != NULL, "Can not add a NULL to an allocation class");
409 regDef->set_register_num( RegisterForm::_reg_ctr++ );
410 // Add regDef to this allocation class
411 _regDefs.addName(regDef->_regname);
412 _regDef.Insert((void*)regDef->_regname, regDef);
413 }
414
dump()415 void AllocClass::dump() {
416 output(stderr);
417 }
418
output(FILE * fp)419 void AllocClass::output(FILE *fp) { // Write info to output files
420 fprintf(fp,"AllocClass: %s \n",_classid);
421 const char *name;
422 for(_regDefs.reset(); (name = _regDefs.iter()) != NULL;) {
423 ((RegDef*)_regDef[name])->output(fp);
424 }
425 fprintf(fp,"--- done with entries for alloc_class %s\n\n",_classid);
426 }
427
428 //==============================Frame Handling=================================
429 //------------------------------FrameForm--------------------------------------
FrameForm()430 FrameForm::FrameForm() {
431 _direction = false;
432 _sync_stack_slots = NULL;
433 _inline_cache_reg = NULL;
434 _interpreter_method_oop_reg = NULL;
435 _interpreter_frame_pointer_reg = NULL;
436 _cisc_spilling_operand_name = NULL;
437 _frame_pointer = NULL;
438 _c_frame_pointer = NULL;
439 _alignment = NULL;
440 _return_addr_loc = false;
441 _c_return_addr_loc = false;
442 _return_addr = NULL;
443 _c_return_addr = NULL;
444 _in_preserve_slots = NULL;
445 _varargs_C_out_slots_killed = NULL;
446 _calling_convention = NULL;
447 _c_calling_convention = NULL;
448 _return_value = NULL;
449 _c_return_value = NULL;
450 }
451
~FrameForm()452 FrameForm::~FrameForm() {
453 }
454
dump()455 void FrameForm::dump() {
456 output(stderr);
457 }
458
output(FILE * fp)459 void FrameForm::output(FILE *fp) { // Write info to output files
460 fprintf(fp,"\nFrame:\n");
461 }
462
463 //==============================Scheduling=====================================
464 //------------------------------PipelineForm-----------------------------------
PipelineForm()465 PipelineForm::PipelineForm()
466 : _reslist ()
467 , _resdict (cmpstr, hashstr, Form::arena)
468 , _classdict (cmpstr, hashstr, Form::arena)
469 , _rescount (0)
470 , _maxcycleused (0)
471 , _stages ()
472 , _stagecnt (0)
473 , _classlist ()
474 , _classcnt (0)
475 , _noplist ()
476 , _nopcnt (0)
477 , _variableSizeInstrs (false)
478 , _branchHasDelaySlot (false)
479 , _maxInstrsPerBundle (0)
480 , _maxBundlesPerCycle (1)
481 , _instrUnitSize (0)
482 , _bundleUnitSize (0)
483 , _instrFetchUnitSize (0)
484 , _instrFetchUnits (0) {
485 }
~PipelineForm()486 PipelineForm::~PipelineForm() {
487 }
488
dump()489 void PipelineForm::dump() {
490 output(stderr);
491 }
492
output(FILE * fp)493 void PipelineForm::output(FILE *fp) { // Write info to output files
494 const char *res;
495 const char *stage;
496 const char *cls;
497 const char *nop;
498 int count = 0;
499
500 fprintf(fp,"\nPipeline:");
501 if (_variableSizeInstrs)
502 if (_instrUnitSize > 0)
503 fprintf(fp," variable-sized instructions in %d byte units", _instrUnitSize);
504 else
505 fprintf(fp," variable-sized instructions");
506 else
507 if (_instrUnitSize > 0)
508 fprintf(fp," fixed-sized instructions of %d bytes", _instrUnitSize);
509 else if (_bundleUnitSize > 0)
510 fprintf(fp," fixed-sized bundles of %d bytes", _bundleUnitSize);
511 else
512 fprintf(fp," fixed-sized instructions");
513 if (_branchHasDelaySlot)
514 fprintf(fp,", branch has delay slot");
515 if (_maxInstrsPerBundle > 0)
516 fprintf(fp,", max of %d instruction%s in parallel",
517 _maxInstrsPerBundle, _maxInstrsPerBundle > 1 ? "s" : "");
518 if (_maxBundlesPerCycle > 0)
519 fprintf(fp,", max of %d bundle%s in parallel",
520 _maxBundlesPerCycle, _maxBundlesPerCycle > 1 ? "s" : "");
521 if (_instrFetchUnitSize > 0 && _instrFetchUnits)
522 fprintf(fp, ", fetch %d x % d bytes per cycle", _instrFetchUnits, _instrFetchUnitSize);
523
524 fprintf(fp,"\nResource:");
525 for ( _reslist.reset(); (res = _reslist.iter()) != NULL; )
526 fprintf(fp," %s(0x%08x)", res, _resdict[res]->is_resource()->mask());
527 fprintf(fp,"\n");
528
529 fprintf(fp,"\nDescription:\n");
530 for ( _stages.reset(); (stage = _stages.iter()) != NULL; )
531 fprintf(fp," %s(%d)", stage, count++);
532 fprintf(fp,"\n");
533
534 fprintf(fp,"\nClasses:\n");
535 for ( _classlist.reset(); (cls = _classlist.iter()) != NULL; )
536 _classdict[cls]->is_pipeclass()->output(fp);
537
538 fprintf(fp,"\nNop Instructions:");
539 for ( _noplist.reset(); (nop = _noplist.iter()) != NULL; )
540 fprintf(fp, " \"%s\"", nop);
541 fprintf(fp,"\n");
542 }
543
544
545 //------------------------------ResourceForm-----------------------------------
ResourceForm(unsigned resmask)546 ResourceForm::ResourceForm(unsigned resmask)
547 : _resmask(resmask) {
548 }
~ResourceForm()549 ResourceForm::~ResourceForm() {
550 }
551
is_resource() const552 ResourceForm *ResourceForm::is_resource() const {
553 return (ResourceForm *)(this);
554 }
555
dump()556 void ResourceForm::dump() {
557 output(stderr);
558 }
559
output(FILE * fp)560 void ResourceForm::output(FILE *fp) { // Write info to output files
561 fprintf(fp, "resource: 0x%08x;\n", mask());
562 }
563
564
565 //------------------------------PipeClassOperandForm----------------------------------
566
dump()567 void PipeClassOperandForm::dump() {
568 output(stderr);
569 }
570
output(FILE * fp)571 void PipeClassOperandForm::output(FILE *fp) { // Write info to output files
572 fprintf(stderr,"PipeClassOperandForm: %s", _stage);
573 fflush(stderr);
574 if (_more_instrs > 0)
575 fprintf(stderr,"+%d", _more_instrs);
576 fprintf(stderr," (%s)\n", _iswrite ? "write" : "read");
577 fflush(stderr);
578 fprintf(fp,"PipeClassOperandForm: %s", _stage);
579 if (_more_instrs > 0)
580 fprintf(fp,"+%d", _more_instrs);
581 fprintf(fp," (%s)\n", _iswrite ? "write" : "read");
582 }
583
584
585 //------------------------------PipeClassResourceForm----------------------------------
586
dump()587 void PipeClassResourceForm::dump() {
588 output(stderr);
589 }
590
output(FILE * fp)591 void PipeClassResourceForm::output(FILE *fp) { // Write info to output files
592 fprintf(fp,"PipeClassResourceForm: %s at stage %s for %d cycles\n",
593 _resource, _stage, _cycles);
594 }
595
596
597 //------------------------------PipeClassForm----------------------------------
PipeClassForm(const char * id,int num)598 PipeClassForm::PipeClassForm(const char *id, int num)
599 : _ident(id)
600 , _num(num)
601 , _localNames(cmpstr, hashstr, Form::arena)
602 , _localUsage(cmpstr, hashstr, Form::arena)
603 , _has_fixed_latency(0)
604 , _fixed_latency(0)
605 , _instruction_count(0)
606 , _has_multiple_bundles(false)
607 , _has_branch_delay_slot(false)
608 , _force_serialization(false)
609 , _may_have_no_code(false) {
610 }
611
~PipeClassForm()612 PipeClassForm::~PipeClassForm() {
613 }
614
is_pipeclass() const615 PipeClassForm *PipeClassForm::is_pipeclass() const {
616 return (PipeClassForm *)(this);
617 }
618
dump()619 void PipeClassForm::dump() {
620 output(stderr);
621 }
622
output(FILE * fp)623 void PipeClassForm::output(FILE *fp) { // Write info to output files
624 fprintf(fp,"PipeClassForm: #%03d", _num);
625 if (_ident)
626 fprintf(fp," \"%s\":", _ident);
627 if (_has_fixed_latency)
628 fprintf(fp," latency %d", _fixed_latency);
629 if (_force_serialization)
630 fprintf(fp, ", force serialization");
631 if (_may_have_no_code)
632 fprintf(fp, ", may have no code");
633 fprintf(fp, ", %d instruction%s\n", InstructionCount(), InstructionCount() != 1 ? "s" : "");
634 }
635
636
637 //==============================Peephole Optimization==========================
638 int Peephole::_peephole_counter = 0;
639 //------------------------------Peephole---------------------------------------
Peephole()640 Peephole::Peephole() : _match(NULL), _constraint(NULL), _replace(NULL), _next(NULL) {
641 _peephole_number = _peephole_counter++;
642 }
~Peephole()643 Peephole::~Peephole() {
644 }
645
646 // Append a peephole rule with the same root instruction
append_peephole(Peephole * next_peephole)647 void Peephole::append_peephole(Peephole *next_peephole) {
648 if( _next == NULL ) {
649 _next = next_peephole;
650 } else {
651 _next->append_peephole( next_peephole );
652 }
653 }
654
655 // Store the components of this peephole rule
add_match(PeepMatch * match)656 void Peephole::add_match(PeepMatch *match) {
657 assert( _match == NULL, "fatal()" );
658 _match = match;
659 }
660
append_constraint(PeepConstraint * next_constraint)661 void Peephole::append_constraint(PeepConstraint *next_constraint) {
662 if( _constraint == NULL ) {
663 _constraint = next_constraint;
664 } else {
665 _constraint->append( next_constraint );
666 }
667 }
668
add_replace(PeepReplace * replace)669 void Peephole::add_replace(PeepReplace *replace) {
670 assert( _replace == NULL, "fatal()" );
671 _replace = replace;
672 }
673
674 // class Peephole accessor methods are in the declaration.
675
676
dump()677 void Peephole::dump() {
678 output(stderr);
679 }
680
output(FILE * fp)681 void Peephole::output(FILE *fp) { // Write info to output files
682 fprintf(fp,"Peephole:\n");
683 if( _match != NULL ) _match->output(fp);
684 if( _constraint != NULL ) _constraint->output(fp);
685 if( _replace != NULL ) _replace->output(fp);
686 // Output the next entry
687 if( _next ) _next->output(fp);
688 }
689
690 //------------------------------PeepMatch--------------------------------------
PeepMatch(char * rule)691 PeepMatch::PeepMatch(char *rule) : _max_position(0), _rule(rule) {
692 }
~PeepMatch()693 PeepMatch::~PeepMatch() {
694 }
695
696
697 // Insert info into the match-rule
add_instruction(int parent,int position,const char * name,int input)698 void PeepMatch::add_instruction(int parent, int position, const char *name,
699 int input) {
700 if( position > _max_position ) _max_position = position;
701
702 _parent.addName((char*) (intptr_t) parent);
703 _position.addName((char*) (intptr_t) position);
704 _instrs.addName(name);
705 _input.addName((char*) (intptr_t) input);
706 }
707
708 // Access info about instructions in the peep-match rule
max_position()709 int PeepMatch::max_position() {
710 return _max_position;
711 }
712
instruction_name(int position)713 const char *PeepMatch::instruction_name(int position) {
714 return _instrs.name(position);
715 }
716
717 // Iterate through all info on matched instructions
reset()718 void PeepMatch::reset() {
719 _parent.reset();
720 _position.reset();
721 _instrs.reset();
722 _input.reset();
723 }
724
next_instruction(int & parent,int & position,const char * & name,int & input)725 void PeepMatch::next_instruction(int &parent, int &position, const char* &name, int &input) {
726 parent = (int) (intptr_t) _parent.iter();
727 position = (int) (intptr_t) _position.iter();
728 name = _instrs.iter();
729 input = (int) (intptr_t) _input.iter();
730 }
731
732 // 'true' if current position in iteration is a placeholder, not matched.
is_placeholder()733 bool PeepMatch::is_placeholder() {
734 return _instrs.current_is_signal();
735 }
736
737
dump()738 void PeepMatch::dump() {
739 output(stderr);
740 }
741
output(FILE * fp)742 void PeepMatch::output(FILE *fp) { // Write info to output files
743 fprintf(fp,"PeepMatch:\n");
744 }
745
746 //------------------------------PeepConstraint---------------------------------
PeepConstraint(int left_inst,char * left_op,char * relation,int right_inst,char * right_op)747 PeepConstraint::PeepConstraint(int left_inst, char* left_op, char* relation,
748 int right_inst, char* right_op)
749 : _left_inst(left_inst), _left_op(left_op), _relation(relation),
750 _right_inst(right_inst), _right_op(right_op), _next(NULL) {}
~PeepConstraint()751 PeepConstraint::~PeepConstraint() {
752 }
753
754 // Check if constraints use instruction at position
constrains_instruction(int position)755 bool PeepConstraint::constrains_instruction(int position) {
756 // Check local instruction constraints
757 if( _left_inst == position ) return true;
758 if( _right_inst == position ) return true;
759
760 // Check remaining constraints in list
761 if( _next == NULL ) return false;
762 else return _next->constrains_instruction(position);
763 }
764
765 // Add another constraint
append(PeepConstraint * next_constraint)766 void PeepConstraint::append(PeepConstraint *next_constraint) {
767 if( _next == NULL ) {
768 _next = next_constraint;
769 } else {
770 _next->append( next_constraint );
771 }
772 }
773
774 // Access the next constraint in the list
next()775 PeepConstraint *PeepConstraint::next() {
776 return _next;
777 }
778
779
dump()780 void PeepConstraint::dump() {
781 output(stderr);
782 }
783
output(FILE * fp)784 void PeepConstraint::output(FILE *fp) { // Write info to output files
785 fprintf(fp,"PeepConstraint:\n");
786 }
787
788 //------------------------------PeepReplace------------------------------------
PeepReplace(char * rule)789 PeepReplace::PeepReplace(char *rule) : _rule(rule) {
790 }
~PeepReplace()791 PeepReplace::~PeepReplace() {
792 }
793
794 // Add contents of peepreplace
add_instruction(char * root)795 void PeepReplace::add_instruction(char *root) {
796 _instruction.addName(root);
797 _operand_inst_num.add_signal();
798 _operand_op_name.add_signal();
799 }
add_operand(int inst_num,char * inst_operand)800 void PeepReplace::add_operand( int inst_num, char *inst_operand ) {
801 _instruction.add_signal();
802 _operand_inst_num.addName((char*) (intptr_t) inst_num);
803 _operand_op_name.addName(inst_operand);
804 }
805
806 // Access contents of peepreplace
reset()807 void PeepReplace::reset() {
808 _instruction.reset();
809 _operand_inst_num.reset();
810 _operand_op_name.reset();
811 }
next_instruction(const char * & inst)812 void PeepReplace::next_instruction(const char* &inst){
813 inst = _instruction.iter();
814 int inst_num = (int) (intptr_t) _operand_inst_num.iter();
815 const char* inst_operand = _operand_op_name.iter();
816 }
next_operand(int & inst_num,const char * & inst_operand)817 void PeepReplace::next_operand(int &inst_num, const char* &inst_operand) {
818 const char* inst = _instruction.iter();
819 inst_num = (int) (intptr_t) _operand_inst_num.iter();
820 inst_operand = _operand_op_name.iter();
821 }
822
823
824
dump()825 void PeepReplace::dump() {
826 output(stderr);
827 }
828
output(FILE * fp)829 void PeepReplace::output(FILE *fp) { // Write info to output files
830 fprintf(fp,"PeepReplace:\n");
831 }
832