1 /*
  2  * Copyright (c) 1999, 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  *
  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 #include "precompiled.hpp"
 26 #include "classfile/vmSymbols.hpp"
 27 #include "c1/c1_InstructionPrinter.hpp"
 28 #include "c1/c1_ValueStack.hpp"
 29 #include "ci/ciArray.hpp"
 30 #include "ci/ciInlineKlass.hpp"
 31 #include "ci/ciInstance.hpp"
 32 #include "ci/ciObject.hpp"
 33 
 34 
 35 #ifndef PRODUCT
 36 
 37 const char* InstructionPrinter::basic_type_name(BasicType type) {
 38   const char* n = type2name(type);
 39   if (n == nullptr || type > T_VOID) {
 40     return "???";
 41   }
 42   return n;
 43 }
 44 
 45 
 46 const char* InstructionPrinter::cond_name(If::Condition cond) {
 47   switch (cond) {
 48     case If::eql: return "==";
 49     case If::neq: return "!=";
 50     case If::lss: return "<";
 51     case If::leq: return "<=";
 52     case If::gtr: return ">";
 53     case If::geq: return ">=";
 54     case If::aeq: return "|>=|";
 55     case If::beq: return "|<=|";
 56     default:
 57       ShouldNotReachHere();
 58       return nullptr;
 59   }
 60 }
 61 
 62 
 63 const char* InstructionPrinter::op_name(Bytecodes::Code op) {
 64   switch (op) {
 65     // arithmetic ops
 66     case Bytecodes::_iadd : // fall through
 67     case Bytecodes::_ladd : // fall through
 68     case Bytecodes::_fadd : // fall through
 69     case Bytecodes::_dadd : return "+";
 70     case Bytecodes::_isub : // fall through
 71     case Bytecodes::_lsub : // fall through
 72     case Bytecodes::_fsub : // fall through
 73     case Bytecodes::_dsub : return "-";
 74     case Bytecodes::_imul : // fall through
 75     case Bytecodes::_lmul : // fall through
 76     case Bytecodes::_fmul : // fall through
 77     case Bytecodes::_dmul : return "*";
 78     case Bytecodes::_idiv : // fall through
 79     case Bytecodes::_ldiv : // fall through
 80     case Bytecodes::_fdiv : // fall through
 81     case Bytecodes::_ddiv : return "/";
 82     case Bytecodes::_irem : // fall through
 83     case Bytecodes::_lrem : // fall through
 84     case Bytecodes::_frem : // fall through
 85     case Bytecodes::_drem : return "%";
 86     // shift ops
 87     case Bytecodes::_ishl : // fall through
 88     case Bytecodes::_lshl : return "<<";
 89     case Bytecodes::_ishr : // fall through
 90     case Bytecodes::_lshr : return ">>";
 91     case Bytecodes::_iushr: // fall through
 92     case Bytecodes::_lushr: return ">>>";
 93     // logic ops
 94     case Bytecodes::_iand : // fall through
 95     case Bytecodes::_land : return "&";
 96     case Bytecodes::_ior  : // fall through
 97     case Bytecodes::_lor  : return "|";
 98     case Bytecodes::_ixor : // fall through
 99     case Bytecodes::_lxor : return "^";
100     default               : return Bytecodes::name(op);
101   }
102 }
103 
104 
105 bool InstructionPrinter::is_illegal_phi(Value v) {
106   Phi* phi = v ? v->as_Phi() : nullptr;
107   if (phi && phi->is_illegal()) {
108     return true;
109   }
110   return false;
111 }
112 
113 
114 bool InstructionPrinter::is_phi_of_block(Value v, BlockBegin* b) {
115   Phi* phi = v ? v->as_Phi() : nullptr;
116   return phi && phi->block() == b;
117 }
118 
119 
120 void InstructionPrinter::print_klass(ciKlass* klass) {
121   klass->name()->print_symbol_on(output());
122 }
123 
124 
125 void InstructionPrinter::print_object(Value obj) {
126   ValueType* type = obj->type();
127   if (type->as_ObjectConstant() != nullptr) {
128     ciObject* value = type->as_ObjectConstant()->value();
129     if (value->is_null_object()) {
130       output()->print("null");
131     } else if (!value->is_loaded()) {
132       output()->print("<unloaded object " INTPTR_FORMAT ">", p2i(value));
133     } else {
134       output()->print("<object " INTPTR_FORMAT " klass=", p2i(value->constant_encoding()));
135       print_klass(value->klass());
136       output()->print(">");
137     }
138   } else if (type->as_InstanceConstant() != nullptr) {
139     ciInstance* value = type->as_InstanceConstant()->value();
140     if (value->is_loaded()) {
141       output()->print("<instance " INTPTR_FORMAT " klass=", p2i(value->constant_encoding()));
142       print_klass(value->klass());
143       output()->print(">");
144     } else {
145       output()->print("<unloaded instance " INTPTR_FORMAT ">", p2i(value));
146     }
147   } else if (type->as_ArrayConstant() != nullptr) {
148     output()->print("<array " INTPTR_FORMAT ">", p2i(type->as_ArrayConstant()->value()->constant_encoding()));
149   } else if (type->as_ClassConstant() != nullptr) {
150     ciInstanceKlass* klass = type->as_ClassConstant()->value();
151     if (!klass->is_loaded()) {
152       output()->print("<unloaded> ");
153     }
154     output()->print("class ");
155     print_klass(klass);
156   } else if (type->as_MethodConstant() != nullptr) {
157     ciMethod* m = type->as_MethodConstant()->value();
158     output()->print("<method %s.%s>", m->holder()->name()->as_utf8(), m->name()->as_utf8());
159   } else {
160     output()->print("???");
161   }
162 }
163 
164 
165 void InstructionPrinter::print_temp(Value value) {
166   output()->print("%c%d", value->type()->tchar(), value->id());
167 }
168 
169 
170 void InstructionPrinter::print_field(AccessField* field) {
171   print_value(field->obj());
172   output()->print("._%d", field->offset());
173 }
174 
175 
176 void InstructionPrinter::print_indexed(AccessIndexed* indexed) {
177   print_value(indexed->array());
178   output()->put('[');
179   print_value(indexed->index());
180   output()->put(']');
181   if (indexed->length() != nullptr) {
182     output()->put('(');
183     print_value(indexed->length());
184     output()->put(')');
185   }
186 }
187 
188 
189 void InstructionPrinter::print_monitor(AccessMonitor* monitor) {
190   output()->print("monitor[%d](", monitor->monitor_no());
191   print_value(monitor->obj());
192   output()->put(')');
193 }
194 
195 
196 void InstructionPrinter::print_op2(Op2* instr) {
197   print_value(instr->x());
198   output()->print(" %s ", op_name(instr->op()));
199   print_value(instr->y());
200 }
201 
202 
203 void InstructionPrinter::print_value(Value value) {
204   if (value == nullptr) {
205     output()->print("null");
206   } else {
207     print_temp(value);
208   }
209 }
210 
211 
212 void InstructionPrinter::print_instr(Instruction* instr) {
213   instr->visit(this);
214 }
215 
216 
217 void InstructionPrinter::print_stack(ValueStack* stack) {
218   int start_position = output()->position();
219   if (stack->stack_is_empty()) {
220     output()->print("empty stack");
221   } else {
222     output()->print("stack [");
223     for (int i = 0; i < stack->stack_size();) {
224       if (i > 0) output()->print(", ");
225       output()->print("%d:", i);
226       Value value = stack->stack_at_inc(i);
227       print_value(value);
228       Phi* phi = value->as_Phi();
229       if (phi != nullptr) {
230         if (phi->operand()->is_valid()) {
231           output()->print(" ");
232           phi->operand()->print(output());
233         }
234       }
235     }
236     output()->put(']');
237   }
238   if (!stack->no_active_locks()) {
239     // print out the lines on the line below this
240     // one at the same indentation level.
241     output()->cr();
242     fill_to(start_position, ' ');
243     output()->print("locks [");
244     for (int i = 0; i < stack->locks_size(); i++) {
245       Value t = stack->lock_at(i);
246       if (i > 0) output()->print(", ");
247       output()->print("%d:", i);
248       if (t == nullptr) {
249         // synchronized methods push null on the lock stack
250         output()->print("this");
251       } else {
252         print_value(t);
253       }
254     }
255     output()->print("]");
256   }
257 }
258 
259 
260 void InstructionPrinter::print_inline_level(BlockBegin* block) {
261   output()->print_cr("inlining depth %d", block->scope()->level());
262 }
263 
264 
265 void InstructionPrinter::print_unsafe_op(UnsafeOp* op, const char* name) {
266   output()->print("%s(", name);
267   print_value(op->object());
268   output()->print(", ");
269   print_value(op->offset());
270 }
271 
272 
273 void InstructionPrinter::print_phi(int i, Value v, BlockBegin* b) {
274   Phi* phi = v->as_Phi();
275   output()->print("%2d  ", i);
276   print_value(v);
277   // print phi operands
278   if (phi && phi->block() == b) {
279     output()->print(" [");
280     for (int j = 0; j < phi->operand_count(); j ++) {
281       output()->print(" ");
282       Value opd = phi->operand_at(j);
283       if (opd) print_value(opd);
284       else output()->print("null");
285     }
286     output()->print("] ");
287   }
288   print_alias(v);
289 }
290 
291 
292 void InstructionPrinter::print_alias(Value v) {
293   if (v != v->subst()) {
294     output()->print("alias "); print_value(v->subst());
295   }
296 }
297 
298 
299 void InstructionPrinter::fill_to(int pos, char filler) {
300   while (output()->position() < pos) output()->put(filler);
301 }
302 
303 
304 void InstructionPrinter::print_head() {
305   const char filler = '_';
306   fill_to(bci_pos  , filler); output()->print("bci"  );
307   fill_to(use_pos  , filler); output()->print("use"  );
308   fill_to(temp_pos , filler); output()->print("tid"  );
309   fill_to(instr_pos, filler); output()->print("instr");
310   fill_to(end_pos  , filler);
311   output()->cr();
312 }
313 
314 
315 void InstructionPrinter::print_line(Instruction* instr) {
316   // print instruction data on one line
317   if (instr->is_pinned()) output()->put('.');
318   if (instr->has_printable_bci()) {
319     fill_to(bci_pos  ); output()->print("%d", instr->printable_bci());
320   }
321   fill_to(use_pos  ); output()->print("%d", instr->use_count());
322   fill_to(temp_pos ); print_temp(instr);
323   fill_to(instr_pos); print_instr(instr);
324   output()->cr();
325   // add a line for StateSplit instructions w/ non-empty stacks
326   // (make it robust so we can print incomplete instructions)
327   StateSplit* split = instr->as_StateSplit();
328   if (split != nullptr && split->state() != nullptr && !split->state()->stack_is_empty()) {
329     fill_to(instr_pos); print_stack(split->state());
330     output()->cr();
331   }
332 }
333 
334 
335 void InstructionPrinter::do_Phi(Phi* x) {
336   output()->print("phi function");  // make that more detailed later
337   if (x->is_illegal())
338     output()->print(" (illegal)");
339 }
340 
341 
342 void InstructionPrinter::do_Local(Local* x) {
343   output()->print("local[index %d]", x->java_index());
344 }
345 
346 
347 void InstructionPrinter::do_Constant(Constant* x) {
348   ValueType* t = x->type();
349   switch (t->tag()) {
350     case intTag    : output()->print("%d"  , t->as_IntConstant   ()->value());    break;
351     case longTag   : output()->print(JLONG_FORMAT, t->as_LongConstant()->value()); output()->print("L"); break;
352     case floatTag  : output()->print("%g"  , t->as_FloatConstant ()->value());    break;
353     case doubleTag : output()->print("%gD" , t->as_DoubleConstant()->value());    break;
354     case objectTag : print_object(x);                                        break;
355     case addressTag: output()->print("bci:%d", t->as_AddressConstant()->value()); break;
356     default        : output()->print("???");                                      break;
357   }
358 }
359 
360 
361 void InstructionPrinter::do_LoadField(LoadField* x) {
362   print_field(x);
363   output()->print(" (%c)", type2char(x->field()->type()->basic_type()));
364   output()->print(" %s", x->field()->name()->as_utf8());
365 }
366 
367 
368 void InstructionPrinter::do_StoreField(StoreField* x) {
369   print_field(x);
370   output()->print(" := ");
371   print_value(x->value());
372   output()->print(" (%c)", type2char(x->field()->type()->basic_type()));
373   output()->print(" %s", x->field()->name()->as_utf8());
374 }
375 
376 
377 void InstructionPrinter::do_ArrayLength(ArrayLength* x) {
378   print_value(x->array());
379   output()->print(".length");
380 }
381 
382 
383 void InstructionPrinter::do_LoadIndexed(LoadIndexed* x) {
384   print_indexed(x);
385   if (x->delayed() != nullptr) {
386     output()->print(" +%d", x->delayed()->offset());
387     output()->print(" (%c)", type2char(x->delayed()->field()->type()->basic_type()));
388   } else {
389     output()->print(" (%c)", type2char(x->elt_type()));
390   }
391   if (x->check_flag(Instruction::NeedsRangeCheckFlag)) {
392     output()->print(" [rc]");
393   }
394 }
395 
396 
397 void InstructionPrinter::do_StoreIndexed(StoreIndexed* x) {
398   print_indexed(x);
399   output()->print(" := ");
400   print_value(x->value());
401   output()->print(" (%c)", type2char(x->elt_type()));
402   if (x->check_flag(Instruction::NeedsRangeCheckFlag)) {
403     output()->print(" [rc]");
404   }
405 }
406 
407 void InstructionPrinter::do_NegateOp(NegateOp* x) {
408   output()->put('-');
409   print_value(x->x());
410 }
411 
412 
413 void InstructionPrinter::do_ArithmeticOp(ArithmeticOp* x) {
414   print_op2(x);
415 }
416 
417 
418 void InstructionPrinter::do_ShiftOp(ShiftOp* x) {
419   print_op2(x);
420 }
421 
422 
423 void InstructionPrinter::do_LogicOp(LogicOp* x) {
424   print_op2(x);
425 }
426 
427 
428 void InstructionPrinter::do_CompareOp(CompareOp* x) {
429   print_op2(x);
430 }
431 
432 
433 void InstructionPrinter::do_IfOp(IfOp* x) {
434   print_value(x->x());
435   output()->print(" %s ", cond_name(x->cond()));
436   print_value(x->y());
437   output()->print(" ? ");
438   print_value(x->tval());
439   output()->print(" : ");
440   print_value(x->fval());
441 }
442 
443 
444 void InstructionPrinter::do_Convert(Convert* x) {
445   output()->print("%s(", Bytecodes::name(x->op()));
446   print_value(x->value());
447   output()->put(')');
448 }
449 
450 
451 void InstructionPrinter::do_NullCheck(NullCheck* x) {
452   output()->print("null_check(");
453   print_value(x->obj());
454   output()->put(')');
455   if (!x->can_trap()) {
456     output()->print(" (eliminated)");
457   }
458 }
459 
460 
461 void InstructionPrinter::do_TypeCast(TypeCast* x) {
462   output()->print("type_cast(");
463   print_value(x->obj());
464   output()->print(") ");
465   if (x->declared_type()->is_klass())
466     print_klass(x->declared_type()->as_klass());
467   else
468     output()->print("%s", type2name(x->declared_type()->basic_type()));
469 }
470 
471 
472 void InstructionPrinter::do_Invoke(Invoke* x) {
473   if (x->receiver() != nullptr) {
474     print_value(x->receiver());
475     output()->print(".");
476   }
477 
478   output()->print("%s(", Bytecodes::name(x->code()));
479   for (int i = 0; i < x->number_of_arguments(); i++) {
480     if (i > 0) output()->print(", ");
481     print_value(x->argument_at(i));
482   }
483   output()->print_cr(")");
484   fill_to(instr_pos);
485   output()->print("%s.%s%s",
486              x->target()->holder()->name()->as_utf8(),
487              x->target()->name()->as_utf8(),
488              x->target()->signature()->as_symbol()->as_utf8());
489 }
490 
491 
492 void InstructionPrinter::do_NewInstance(NewInstance* x) {
493   output()->print("new instance ");
494   print_klass(x->klass());
495 }
496 
497 
498 void InstructionPrinter::do_NewTypeArray(NewTypeArray* x) {
499   output()->print("new %s array [", basic_type_name(x->elt_type()));
500   print_value(x->length());
501   output()->put(']');
502 }
503 
504 void InstructionPrinter::do_NewObjectArray(NewObjectArray* x) {
505   output()->print("new object array [");
506   print_value(x->length());
507   output()->print("] ");
508   print_klass(x->klass());
509 }
510 
511 
512 void InstructionPrinter::do_NewMultiArray(NewMultiArray* x) {
513   output()->print("new multi array [");
514   Values* dims = x->dims();
515   for (int i = 0; i < dims->length(); i++) {
516     if (i > 0) output()->print(", ");
517     print_value(dims->at(i));
518   }
519   output()->print("] ");
520   print_klass(x->klass());
521 }
522 
523 void InstructionPrinter::do_MonitorEnter(MonitorEnter* x) {
524   output()->print("enter ");
525   print_monitor(x);
526 }
527 
528 
529 void InstructionPrinter::do_MonitorExit(MonitorExit* x) {
530   output()->print("exit ");
531   print_monitor(x);
532 }
533 
534 
535 void InstructionPrinter::do_Intrinsic(Intrinsic* x) {
536   const char* name = vmIntrinsics::name_at(x->id());
537   if (name[0] == '_')  name++;  // strip leading bug from _hashCode, etc.
538   const char* kname = vmSymbols::name_for(vmIntrinsics::class_for(x->id()));
539   if (strchr(name, '_') == nullptr) {
540     kname = nullptr;
541   } else {
542     const char* kptr = strrchr(kname, '/');
543     if (kptr != nullptr)  kname = kptr + 1;
544   }
545   if (kname == nullptr)
546     output()->print("%s(", name);
547   else
548     output()->print("%s.%s(", kname, name);
549   for (int i = 0; i < x->number_of_arguments(); i++) {
550     if (i > 0) output()->print(", ");
551     print_value(x->argument_at(i));
552   }
553   output()->put(')');
554 }
555 
556 
557 void InstructionPrinter::do_BlockBegin(BlockBegin* x) {
558   // print block id
559   BlockEnd* end = x->end();
560   output()->print("B%d ", x->block_id());
561 
562   // print flags
563   bool printed_flag = false;
564   if (x->is_set(BlockBegin::std_entry_flag)) {
565     if (!printed_flag) output()->print("(");
566     output()->print("S"); printed_flag = true;
567   }
568   if (x->is_set(BlockBegin::osr_entry_flag)) {
569     if (!printed_flag) output()->print("(");
570     output()->print("O"); printed_flag = true;
571   }
572   if (x->is_set(BlockBegin::exception_entry_flag)) {
573     if (!printed_flag) output()->print("(");
574     output()->print("E"); printed_flag = true;
575   }
576   if (x->is_set(BlockBegin::subroutine_entry_flag)) {
577     if (!printed_flag) output()->print("(");
578     output()->print("s"); printed_flag = true;
579   }
580   if (x->is_set(BlockBegin::parser_loop_header_flag)) {
581     if (!printed_flag) output()->print("(");
582     output()->print("LH"); printed_flag = true;
583   }
584   if (x->is_set(BlockBegin::backward_branch_target_flag)) {
585     if (!printed_flag) output()->print("(");
586     output()->print("b"); printed_flag = true;
587   }
588   if (x->is_set(BlockBegin::was_visited_flag)) {
589     if (!printed_flag) output()->print("(");
590     output()->print("V"); printed_flag = true;
591   }
592   if (printed_flag) output()->print(") ");
593 
594   // print block bci range
595   output()->print("[%d, %d]", x->bci(), (end == nullptr ? -1 : end->printable_bci()));
596 
597   // print block successors
598   if (end != nullptr && end->number_of_sux() > 0) {
599     output()->print(" ->");
600     for (int i = 0; i < end->number_of_sux(); i++) {
601       output()->print(" B%d", end->sux_at(i)->block_id());
602     }
603   }
604   // print exception handlers
605   if (x->number_of_exception_handlers() > 0) {
606     output()->print(" (xhandlers ");
607     for (int i = 0; i < x->number_of_exception_handlers();  i++) {
608       if (i > 0) output()->print(" ");
609       output()->print("B%d", x->exception_handler_at(i)->block_id());
610     }
611     output()->put(')');
612   }
613 
614   // print dominator block
615   if (x->dominator() != nullptr) {
616     output()->print(" dom B%d", x->dominator()->block_id());
617   }
618 
619   // print predecessors
620   if (x->number_of_preds() > 0) {
621     output()->print(" pred:");
622     for (int i = 0; i < x->number_of_preds(); i ++) {
623       output()->print(" B%d", x->pred_at(i)->block_id());
624     }
625   }
626 
627   if (!_print_phis) {
628     return;
629   }
630 
631   // print phi functions
632   bool has_phis_in_locals = false;
633   bool has_phis_on_stack = false;
634 
635   if (x->end() && x->end()->state()) {
636     ValueStack* state = x->state();
637 
638     int i = 0;
639     while (!has_phis_on_stack && i < state->stack_size()) {
640       Value v = state->stack_at_inc(i);
641       has_phis_on_stack = is_phi_of_block(v, x);
642     }
643 
644     do {
645       for (i = 0; !has_phis_in_locals && i < state->locals_size();) {
646         Value v = state->local_at(i);
647         has_phis_in_locals = is_phi_of_block(v, x);
648         // also ignore illegal HiWords
649         if (v && !v->type()->is_illegal()) i += v->type()->size(); else i ++;
650       }
651       state = state->caller_state();
652     } while (state != nullptr);
653 
654   }
655 
656   // print values in locals
657   if (has_phis_in_locals) {
658     output()->cr(); output()->print_cr("Locals:");
659 
660     ValueStack* state = x->state();
661     do {
662       for (int i = 0; i < state->locals_size();) {
663         Value v = state->local_at(i);
664         if (v) {
665           print_phi(i, v, x); output()->cr();
666           // also ignore illegal HiWords
667           i += (v->type()->is_illegal() ? 1 : v->type()->size());
668         } else {
669           i ++;
670         }
671       }
672       output()->cr();
673       state = state->caller_state();
674     } while (state != nullptr);
675   }
676 
677   // print values on stack
678   if (has_phis_on_stack) {
679     output()->print_cr("Stack:");
680     int i = 0;
681     while (i < x->state()->stack_size()) {
682       int o = i;
683       Value v = x->state()->stack_at_inc(i);
684       if (v) {
685         print_phi(o, v, x); output()->cr();
686       }
687     }
688   }
689 }
690 
691 
692 void InstructionPrinter::do_CheckCast(CheckCast* x) {
693   output()->print("checkcast(");
694   print_value(x->obj());
695   output()->print(") ");
696   print_klass(x->klass());
697 }
698 
699 
700 void InstructionPrinter::do_InstanceOf(InstanceOf* x) {
701   output()->print("instanceof(");
702   print_value(x->obj());
703   output()->print(") ");
704   print_klass(x->klass());
705 }
706 
707 
708 void InstructionPrinter::do_Goto(Goto* x) {
709   output()->print("goto B%d", x->default_sux()->block_id());
710   if (x->is_safepoint()) output()->print(" (safepoint)");
711 }
712 
713 
714 void InstructionPrinter::do_If(If* x) {
715   output()->print("if ");
716   print_value(x->x());
717   output()->print(" %s ", cond_name(x->cond()));
718   print_value(x->y());
719   output()->print(" then B%d else B%d", x->sux_at(0)->block_id(), x->sux_at(1)->block_id());
720   if (x->is_safepoint()) output()->print(" (safepoint)");
721 }
722 
723 
724 void InstructionPrinter::do_TableSwitch(TableSwitch* x) {
725   output()->print("tableswitch ");
726   if (x->is_safepoint()) output()->print("(safepoint) ");
727   print_value(x->tag());
728   output()->cr();
729   int l = x->length();
730   for (int i = 0; i < l; i++) {
731     fill_to(instr_pos);
732     output()->print_cr("case %5d: B%d", x->lo_key() + i, x->sux_at(i)->block_id());
733   }
734   fill_to(instr_pos);
735   output()->print("default   : B%d", x->default_sux()->block_id());
736 }
737 
738 
739 void InstructionPrinter::do_LookupSwitch(LookupSwitch* x) {
740   output()->print("lookupswitch ");
741   if (x->is_safepoint()) output()->print("(safepoint) ");
742   print_value(x->tag());
743   output()->cr();
744   int l = x->length();
745   for (int i = 0; i < l; i++) {
746     fill_to(instr_pos);
747     output()->print_cr("case %5d: B%d", x->key_at(i), x->sux_at(i)->block_id());
748   }
749   fill_to(instr_pos);
750   output()->print("default   : B%d", x->default_sux()->block_id());
751 }
752 
753 
754 void InstructionPrinter::do_Return(Return* x) {
755   if (x->result() == nullptr) {
756     output()->print("return");
757   } else {
758     output()->print("%creturn ", x->type()->tchar());
759     print_value(x->result());
760   }
761 }
762 
763 
764 void InstructionPrinter::do_Throw(Throw* x) {
765   output()->print("throw ");
766   print_value(x->exception());
767 }
768 
769 
770 void InstructionPrinter::do_Base(Base* x) {
771   output()->print("std entry B%d", x->std_entry()->block_id());
772   if (x->number_of_sux() > 1) {
773     output()->print(" osr entry B%d", x->osr_entry()->block_id());
774   }
775 }
776 
777 
778 void InstructionPrinter::do_OsrEntry(OsrEntry* x) {
779   output()->print("osr entry");
780 }
781 
782 
783 void InstructionPrinter::do_ExceptionObject(ExceptionObject* x) {
784   output()->print("incoming exception");
785 }
786 
787 
788 void InstructionPrinter::do_RoundFP(RoundFP* x) {
789   output()->print("round_fp ");
790   print_value(x->input());
791 }
792 
793 void InstructionPrinter::do_UnsafeGet(UnsafeGet* x) {
794   print_unsafe_op(x, x->is_raw() ? "UnsafeGet (raw)" : "UnsafeGet");
795   output()->put(')');
796 }
797 
798 void InstructionPrinter::do_UnsafePut(UnsafePut* x) {
799   print_unsafe_op(x, "UnsafePut");
800   output()->print(", value ");
801   print_value(x->value());
802   output()->put(')');
803 }
804 
805 void InstructionPrinter::do_UnsafeGetAndSet(UnsafeGetAndSet* x) {
806   print_unsafe_op(x, x->is_add()?"UnsafeGetAndSet (add)":"UnsafeGetAndSet");
807   output()->print(", value ");
808   print_value(x->value());
809   output()->put(')');
810 }
811 
812 void InstructionPrinter::do_RangeCheckPredicate(RangeCheckPredicate* x) {
813 
814   if (x->x() != nullptr && x->y() != nullptr) {
815     output()->print("if ");
816     print_value(x->x());
817     output()->print(" %s ", cond_name(x->cond()));
818     print_value(x->y());
819     output()->print(" then deoptimize!");
820   } else {
821     output()->print("always deoptimize!");
822   }
823 }
824 
825 #ifdef ASSERT
826 void InstructionPrinter::do_Assert(Assert* x) {
827   output()->print("assert ");
828   print_value(x->x());
829   output()->print(" %s ", cond_name(x->cond()));
830   print_value(x->y());
831 }
832 #endif
833 
834 void InstructionPrinter::do_ProfileCall(ProfileCall* x) {
835   output()->print("profile ");
836   print_value(x->recv());
837   output()->print(" %s.%s", x->method()->holder()->name()->as_utf8(), x->method()->name()->as_utf8());
838   if (x->known_holder() != nullptr) {
839     output()->print(", ");
840     print_klass(x->known_holder());
841     output()->print(" ");
842   }
843   for (int i = 0; i < x->nb_profiled_args(); i++) {
844     if (i > 0) output()->print(", ");
845     print_value(x->profiled_arg_at(i));
846     if (x->arg_needs_null_check(i)) {
847       output()->print(" [NC]");
848     }
849   }
850   output()->put(')');
851 }
852 
853 void InstructionPrinter::do_ProfileReturnType(ProfileReturnType* x) {
854   output()->print("profile ret type ");
855   print_value(x->ret());
856   output()->print(" %s.%s", x->method()->holder()->name()->as_utf8(), x->method()->name()->as_utf8());
857   output()->put(')');
858 }
859 
860 void InstructionPrinter::do_ProfileInvoke(ProfileInvoke* x) {
861   output()->print("profile_invoke ");
862   output()->print(" %s.%s", x->inlinee()->holder()->name()->as_utf8(), x->inlinee()->name()->as_utf8());
863   output()->put(')');
864 
865 }
866 
867 void InstructionPrinter::do_ProfileACmpTypes(ProfileACmpTypes* x) {
868   output()->print("profile acmp types ");
869   print_value(x->left());
870   output()->print(", ");
871   print_value(x->right());
872 }
873 
874 void InstructionPrinter::do_RuntimeCall(RuntimeCall* x) {
875   output()->print("call_rt %s(", x->entry_name());
876   for (int i = 0; i < x->number_of_arguments(); i++) {
877     if (i > 0) output()->print(", ");
878     print_value(x->argument_at(i));
879   }
880   output()->put(')');
881 }
882 
883 void InstructionPrinter::do_MemBar(MemBar* x) {
884   LIR_Code code = x->code();
885   switch (code) {
886   case lir_membar_acquire   : output()->print("membar_acquire"); break;
887   case lir_membar_release   : output()->print("membar_release"); break;
888   case lir_membar           : output()->print("membar"); break;
889   case lir_membar_loadload  : output()->print("membar_loadload"); break;
890   case lir_membar_storestore: output()->print("membar_storestore"); break;
891   case lir_membar_loadstore : output()->print("membar_loadstore"); break;
892   case lir_membar_storeload : output()->print("membar_storeload"); break;
893   default                   : ShouldNotReachHere(); break;
894   }
895 }
896 
897 #endif // PRODUCT