1 /*
2 * Copyright (c) 1997, 2014, 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 "gc_interface/collectedHeap.hpp"
27 #include "opto/machnode.hpp"
28 #include "opto/regalloc.hpp"
29 #include "opto/shenandoahSupport.hpp"
30
31 //=============================================================================
32 // Return the value requested
33 // result register lookup, corresponding to int_format
34 int MachOper::reg(PhaseRegAlloc *ra_, const Node *node) const {
35 return (int)ra_->get_encode(node);
36 }
37 // input register lookup, corresponding to ext_format
38 int MachOper::reg(PhaseRegAlloc *ra_, const Node *node, int idx) const {
39 return (int)(ra_->get_encode(node->in(idx)));
40 }
41 intptr_t MachOper::constant() const { return 0x00; }
42 relocInfo::relocType MachOper::constant_reloc() const { return relocInfo::none; }
43 jdouble MachOper::constantD() const { ShouldNotReachHere(); return 0.0; }
44 jfloat MachOper::constantF() const { ShouldNotReachHere(); return 0.0; }
45 jlong MachOper::constantL() const { ShouldNotReachHere(); return CONST64(0) ; }
46 TypeOopPtr *MachOper::oop() const { return NULL; }
47 int MachOper::ccode() const { return 0x00; }
48 // A zero, default, indicates this value is not needed.
49 // May need to lookup the base register, as done in int_ and ext_format
50 int MachOper::base (PhaseRegAlloc *ra_, const Node *node, int idx) const { return 0x00; }
51 int MachOper::index(PhaseRegAlloc *ra_, const Node *node, int idx) const { return 0x00; }
52 int MachOper::scale() const { return 0x00; }
53 int MachOper::disp (PhaseRegAlloc *ra_, const Node *node, int idx) const { return 0x00; }
54 int MachOper::constant_disp() const { return 0; }
55 int MachOper::base_position() const { return -1; } // no base input
56 int MachOper::index_position() const { return -1; } // no index input
57 // Check for PC-Relative displacement
58 relocInfo::relocType MachOper::disp_reloc() const { return relocInfo::none; }
59 // Return the label
60 Label* MachOper::label() const { ShouldNotReachHere(); return 0; }
61 intptr_t MachOper::method() const { ShouldNotReachHere(); return 0; }
62
63
64 //------------------------------negate-----------------------------------------
65 // Negate conditional branches. Error for non-branch operands
66 void MachOper::negate() {
67 ShouldNotCallThis();
68 }
69
70 //-----------------------------type--------------------------------------------
71 const Type *MachOper::type() const {
72 return Type::BOTTOM;
73 }
74
75 //------------------------------in_RegMask-------------------------------------
76 const RegMask *MachOper::in_RegMask(int index) const {
77 ShouldNotReachHere();
78 return NULL;
79 }
80
81 //------------------------------dump_spec--------------------------------------
82 // Print any per-operand special info
83 #ifndef PRODUCT
84 void MachOper::dump_spec(outputStream *st) const { }
85 #endif
86
87 //------------------------------hash-------------------------------------------
88 // Print any per-operand special info
89 uint MachOper::hash() const {
90 ShouldNotCallThis();
91 return 5;
92 }
93
94 //------------------------------cmp--------------------------------------------
95 // Print any per-operand special info
96 uint MachOper::cmp( const MachOper &oper ) const {
97 ShouldNotCallThis();
98 return opcode() == oper.opcode();
99 }
100
101 //------------------------------hash-------------------------------------------
102 // Print any per-operand special info
103 uint labelOper::hash() const {
104 return _block_num;
105 }
106
107 //------------------------------cmp--------------------------------------------
108 // Print any per-operand special info
109 uint labelOper::cmp( const MachOper &oper ) const {
110 return (opcode() == oper.opcode()) && (_label == oper.label());
111 }
112
113 //------------------------------hash-------------------------------------------
114 // Print any per-operand special info
115 uint methodOper::hash() const {
116 return (uint)_method;
117 }
118
119 //------------------------------cmp--------------------------------------------
120 // Print any per-operand special info
121 uint methodOper::cmp( const MachOper &oper ) const {
122 return (opcode() == oper.opcode()) && (_method == oper.method());
123 }
124
125
126 //=============================================================================
127 //------------------------------MachNode---------------------------------------
128
129 //------------------------------emit-------------------------------------------
130 void MachNode::emit(CodeBuffer &cbuf, PhaseRegAlloc *ra_) const {
131 #ifdef ASSERT
132 tty->print("missing MachNode emit function: ");
133 dump();
134 #endif
135 ShouldNotCallThis();
136 }
137
138 //---------------------------postalloc_expand----------------------------------
139 // Expand node after register allocation.
140 void MachNode::postalloc_expand(GrowableArray <Node *> *nodes, PhaseRegAlloc *ra_) {}
141
142 //------------------------------size-------------------------------------------
143 // Size of instruction in bytes
144 uint MachNode::size(PhaseRegAlloc *ra_) const {
145 // If a virtual was not defined for this specific instruction,
146 // Call the helper which finds the size by emitting the bits.
147 return MachNode::emit_size(ra_);
148 }
149
150 //------------------------------size-------------------------------------------
151 // Helper function that computes size by emitting code
152 uint MachNode::emit_size(PhaseRegAlloc *ra_) const {
153 // Emit into a trash buffer and count bytes emitted.
154 assert(ra_ == ra_->C->regalloc(), "sanity");
155 return ra_->C->scratch_emit_size(this);
156 }
157
158
159
160 //------------------------------hash-------------------------------------------
161 uint MachNode::hash() const {
162 uint no = num_opnds();
163 uint sum = rule();
164 for( uint i=0; i<no; i++ )
165 sum += _opnds[i]->hash();
166 return sum+Node::hash();
167 }
168
169 //-----------------------------cmp---------------------------------------------
170 uint MachNode::cmp( const Node &node ) const {
171 MachNode& n = *((Node&)node).as_Mach();
172 uint no = num_opnds();
173 if( no != n.num_opnds() ) return 0;
174 if( rule() != n.rule() ) return 0;
175 for( uint i=0; i<no; i++ ) // All operands must match
176 if( !_opnds[i]->cmp( *n._opnds[i] ) )
177 return 0; // mis-matched operands
178 return 1; // match
179 }
180
181 // Return an equivalent instruction using memory for cisc_operand position
182 MachNode *MachNode::cisc_version(int offset, Compile* C) {
183 ShouldNotCallThis();
184 return NULL;
185 }
186
187 void MachNode::use_cisc_RegMask() {
188 ShouldNotReachHere();
189 }
190
191
192 //-----------------------------in_RegMask--------------------------------------
193 const RegMask &MachNode::in_RegMask( uint idx ) const {
194 uint numopnds = num_opnds(); // Virtual call for number of operands
195 uint skipped = oper_input_base(); // Sum of leaves skipped so far
196 if( idx < skipped ) {
197 assert( ideal_Opcode() == Op_AddP, "expected base ptr here" );
198 assert( idx == 1, "expected base ptr here" );
199 // debug info can be anywhere
200 return *Compile::current()->matcher()->idealreg2spillmask[Op_RegP];
201 }
202 uint opcnt = 1; // First operand
203 uint num_edges = _opnds[1]->num_edges(); // leaves for first operand
204 while( idx >= skipped+num_edges ) {
205 skipped += num_edges;
206 opcnt++; // Bump operand count
207 assert( opcnt < numopnds, "Accessing non-existent operand" );
208 num_edges = _opnds[opcnt]->num_edges(); // leaves for next operand
209 }
210
211 const RegMask *rm = cisc_RegMask();
212 if( rm == NULL || (int)opcnt != cisc_operand() ) {
213 rm = _opnds[opcnt]->in_RegMask(idx-skipped);
214 }
215 return *rm;
216 }
217
218 //-----------------------------memory_inputs--------------------------------
219 const MachOper* MachNode::memory_inputs(Node* &base, Node* &index) const {
220 const MachOper* oper = memory_operand();
221
222 if (oper == (MachOper*)-1) {
223 base = NodeSentinel;
224 index = NodeSentinel;
225 } else {
226 base = NULL;
227 index = NULL;
228 if (oper != NULL) {
229 // It has a unique memory operand. Find its index.
230 int oper_idx = num_opnds();
231 while (--oper_idx >= 0) {
232 if (_opnds[oper_idx] == oper) break;
233 }
234 int oper_pos = operand_index(oper_idx);
235 int base_pos = oper->base_position();
236 if (base_pos >= 0) {
237 base = _in[oper_pos+base_pos];
238 }
239 int index_pos = oper->index_position();
240 if (index_pos >= 0) {
241 index = _in[oper_pos+index_pos];
242 }
243 }
244 }
245
246 return oper;
247 }
248
249 //-----------------------------get_base_and_disp----------------------------
250 Node* MachNode::get_base_and_disp(intptr_t &offset, const TypePtr* &adr_type) const {
251
252 // Find the memory inputs using our helper function
253 Node* base;
254 Node* index;
255 const MachOper* oper = memory_inputs(base, index);
256
257 if (oper == NULL) {
258 // Base has been set to NULL
259 offset = 0;
260 } else if (oper == (MachOper*)-1) {
261 // Base has been set to NodeSentinel
262 // There is not a unique memory use here. We will fall to AliasIdxBot.
263 offset = Type::OffsetBot;
264 } else {
265 // Base may be NULL, even if offset turns out to be != 0
266
267 intptr_t disp = oper->constant_disp();
268 int scale = oper->scale();
269 // Now we have collected every part of the ADLC MEMORY_INTER.
270 // See if it adds up to a base + offset.
271 if (index != NULL) {
272 const Type* t_index = index->bottom_type();
273 if (t_index->isa_narrowoop() || t_index->isa_narrowklass()) { // EncodeN, LoadN, LoadConN, LoadNKlass,
274 // EncodeNKlass, LoadConNklass.
275 // Memory references through narrow oops have a
276 // funny base so grab the type from the index:
277 // [R12 + narrow_oop_reg<<3 + offset]
278 assert(base == NULL, "Memory references through narrow oops have no base");
279 offset = disp;
280 adr_type = t_index->make_ptr()->add_offset(offset);
281 return NULL;
282 } else if (!index->is_Con()) {
283 disp = Type::OffsetBot;
284 } else if (disp != Type::OffsetBot) {
285 const TypeX* ti = t_index->isa_intptr_t();
286 if (ti == NULL) {
287 disp = Type::OffsetBot; // a random constant??
288 } else {
289 disp += ti->get_con() << scale;
290 }
291 }
292 }
293 offset = disp;
294
295 // In i486.ad, indOffset32X uses base==RegI and disp==RegP,
296 // this will prevent alias analysis without the following support:
297 // Lookup the TypePtr used by indOffset32X, a compile-time constant oop,
298 // Add the offset determined by the "base", or use Type::OffsetBot.
299 if( adr_type == TYPE_PTR_SENTINAL ) {
300 const TypePtr *t_disp = oper->disp_as_type(); // only !NULL for indOffset32X
301 if (t_disp != NULL) {
302 offset = Type::OffsetBot;
303 const Type* t_base = base->bottom_type();
304 if (t_base->isa_intptr_t()) {
305 const TypeX *t_offset = t_base->is_intptr_t();
306 if( t_offset->is_con() ) {
307 offset = t_offset->get_con();
308 }
309 }
310 adr_type = t_disp->add_offset(offset);
311 } else if( base == NULL && offset != 0 && offset != Type::OffsetBot ) {
312 // Use ideal type if it is oop ptr.
313 const TypePtr *tp = oper->type()->isa_ptr();
314 if( tp != NULL) {
315 adr_type = tp;
316 }
317 }
318 }
319
320 }
321 return base;
322 }
323
324
325 //---------------------------------adr_type---------------------------------
326 const class TypePtr *MachNode::adr_type() const {
327 intptr_t offset = 0;
328 const TypePtr *adr_type = TYPE_PTR_SENTINAL; // attempt computing adr_type
329 Node *base = get_base_and_disp(offset, adr_type);
330
331 if( adr_type != TYPE_PTR_SENTINAL ) {
332 return ShenandoahBarrierNode::fix_addp_type(adr_type, base); // get_base_and_disp has the answer
333 }
334
335 // Direct addressing modes have no base node, simply an indirect
336 // offset, which is always to raw memory.
337 // %%%%% Someday we'd like to allow constant oop offsets which
338 // would let Intel load from static globals in 1 instruction.
339 // Currently Intel requires 2 instructions and a register temp.
340 if (base == NULL) {
341 // NULL base, zero offset means no memory at all (a null pointer!)
342 if (offset == 0) {
343 return NULL;
344 }
345 // NULL base, any offset means any pointer whatever
346 if (offset == Type::OffsetBot) {
347 return TypePtr::BOTTOM;
348 }
349 // %%% make offset be intptr_t
350 assert(!Universe::heap()->is_in_reserved(cast_to_oop(offset)), "must be a raw ptr");
351 return TypeRawPtr::BOTTOM;
352 }
353
354 // base of -1 with no particular offset means all of memory
355 if (base == NodeSentinel) return TypePtr::BOTTOM;
356
357 const Type* t = base->bottom_type();
358 if (t->isa_narrowoop() && Universe::narrow_oop_shift() == 0) {
359 // 32-bit unscaled narrow oop can be the base of any address expression
360 t = t->make_ptr();
361 }
362 if (t->isa_narrowklass() && Universe::narrow_klass_shift() == 0) {
363 // 32-bit unscaled narrow oop can be the base of any address expression
364 t = t->make_ptr();
365 }
366 if (t->isa_intptr_t() && offset != 0 && offset != Type::OffsetBot) {
367 // We cannot assert that the offset does not look oop-ish here.
368 // Depending on the heap layout the cardmark base could land
369 // inside some oopish region. It definitely does for Win2K.
370 // The sum of cardmark-base plus shift-by-9-oop lands outside
371 // the oop-ish area but we can't assert for that statically.
372 return TypeRawPtr::BOTTOM;
373 }
374
375 const TypePtr *tp = t->isa_ptr();
376
377 // be conservative if we do not recognize the type
378 if (tp == NULL) {
379 assert(false, "this path may produce not optimal code");
380 return TypePtr::BOTTOM;
381 }
382 assert(tp->base() != Type::AnyPtr, "not a bare pointer");
383
384 return ShenandoahBarrierNode::fix_addp_type(tp->add_offset(offset), base);
385 }
386
387
388 //-----------------------------operand_index---------------------------------
389 int MachNode::operand_index( uint operand ) const {
390 if( operand < 1 ) return -1;
391 assert(operand < num_opnds(), "oob");
392 if( _opnds[operand]->num_edges() == 0 ) return -1;
393
394 uint skipped = oper_input_base(); // Sum of leaves skipped so far
395 for (uint opcnt = 1; opcnt < operand; opcnt++) {
396 uint num_edges = _opnds[opcnt]->num_edges(); // leaves for operand
397 skipped += num_edges;
398 }
399 return skipped;
400 }
401
402 int MachNode::operand_index(const MachOper *oper) const {
403 uint skipped = oper_input_base(); // Sum of leaves skipped so far
404 uint opcnt;
405 for (opcnt = 1; opcnt < num_opnds(); opcnt++) {
406 if (_opnds[opcnt] == oper) break;
407 uint num_edges = _opnds[opcnt]->num_edges(); // leaves for operand
408 skipped += num_edges;
409 }
410 if (_opnds[opcnt] != oper) return -1;
411 return skipped;
412 }
413
414 //------------------------------peephole---------------------------------------
415 // Apply peephole rule(s) to this instruction
416 MachNode *MachNode::peephole( Block *block, int block_index, PhaseRegAlloc *ra_, int &deleted, Compile* C ) {
417 return NULL;
418 }
419
420 //------------------------------add_case_label---------------------------------
421 // Adds the label for the case
422 void MachNode::add_case_label( int index_num, Label* blockLabel) {
423 ShouldNotCallThis();
424 }
425
426 //------------------------------method_set-------------------------------------
427 // Set the absolute address of a method
428 void MachNode::method_set( intptr_t addr ) {
429 ShouldNotCallThis();
430 }
431
432 //------------------------------rematerialize----------------------------------
433 bool MachNode::rematerialize() const {
434 // Temps are always rematerializable
435 if (is_MachTemp()) return true;
436
437 uint r = rule(); // Match rule
438 if( r < Matcher::_begin_rematerialize ||
439 r >= Matcher::_end_rematerialize )
440 return false;
441
442 // For 2-address instructions, the input live range is also the output
443 // live range. Remateralizing does not make progress on the that live range.
444 if( two_adr() ) return false;
445
446 // Check for rematerializing float constants, or not
447 if( !Matcher::rematerialize_float_constants ) {
448 int op = ideal_Opcode();
449 if( op == Op_ConF || op == Op_ConD )
450 return false;
451 }
452
453 // Defining flags - can't spill these! Must remateralize.
454 if( ideal_reg() == Op_RegFlags )
455 return true;
456
457 // Stretching lots of inputs - don't do it.
458 if( req() > 2 )
459 return false;
460
461 // Don't remateralize somebody with bound inputs - it stretches a
462 // fixed register lifetime.
463 uint idx = oper_input_base();
464 if (req() > idx) {
465 const RegMask &rm = in_RegMask(idx);
466 if (rm.is_bound(ideal_reg()))
467 return false;
468 }
469
470 return true;
471 }
472
473 #ifndef PRODUCT
474 //------------------------------dump_spec--------------------------------------
475 // Print any per-operand special info
476 void MachNode::dump_spec(outputStream *st) const {
477 uint cnt = num_opnds();
478 for( uint i=0; i<cnt; i++ )
479 _opnds[i]->dump_spec(st);
480 const TypePtr *t = adr_type();
481 if( t ) {
482 Compile* C = Compile::current();
483 if( C->alias_type(t)->is_volatile() )
484 st->print(" Volatile!");
485 }
486 }
487
488 //------------------------------dump_format------------------------------------
489 // access to virtual
490 void MachNode::dump_format(PhaseRegAlloc *ra, outputStream *st) const {
491 format(ra, st); // access to virtual
492 }
493 #endif
494
495 //=============================================================================
496 #ifndef PRODUCT
497 void MachTypeNode::dump_spec(outputStream *st) const {
498 _bottom_type->dump_on(st);
499 }
500 #endif
501
502
503 //=============================================================================
504 int MachConstantNode::constant_offset() {
505 // Bind the offset lazily.
506 if (_constant.offset() == -1) {
507 Compile::ConstantTable& constant_table = Compile::current()->constant_table();
508 int offset = constant_table.find_offset(_constant);
509 // If called from Compile::scratch_emit_size return the
510 // pre-calculated offset.
511 // NOTE: If the AD file does some table base offset optimizations
512 // later the AD file needs to take care of this fact.
513 if (Compile::current()->in_scratch_emit_size()) {
514 return constant_table.calculate_table_base_offset() + offset;
515 }
516 _constant.set_offset(constant_table.table_base_offset() + offset);
517 }
518 return _constant.offset();
519 }
520
521 int MachConstantNode::constant_offset_unchecked() const {
522 return _constant.offset();
523 }
524
525 //=============================================================================
526 #ifndef PRODUCT
527 void MachNullCheckNode::format( PhaseRegAlloc *ra_, outputStream *st ) const {
528 int reg = ra_->get_reg_first(in(1)->in(_vidx));
529 st->print("%s %s", Name(), Matcher::regName[reg]);
530 }
531 #endif
532
533 void MachNullCheckNode::emit(CodeBuffer &cbuf, PhaseRegAlloc *ra_) const {
534 // only emits entries in the null-pointer exception handler table
535 }
536 void MachNullCheckNode::label_set(Label* label, uint block_num) {
537 // Nothing to emit
538 }
539 void MachNullCheckNode::save_label( Label** label, uint* block_num ) {
540 // Nothing to emit
541 }
542
543 const RegMask &MachNullCheckNode::in_RegMask( uint idx ) const {
544 if( idx == 0 ) return RegMask::Empty;
545 else return in(1)->as_Mach()->out_RegMask();
546 }
547
548 //=============================================================================
549 const Type *MachProjNode::bottom_type() const {
550 if( _ideal_reg == fat_proj ) return Type::BOTTOM;
551 // Try the normal mechanism first
552 const Type *t = in(0)->bottom_type();
553 if( t->base() == Type::Tuple ) {
554 const TypeTuple *tt = t->is_tuple();
555 if (_con < tt->cnt())
556 return tt->field_at(_con);
557 }
558 // Else use generic type from ideal register set
559 assert((uint)_ideal_reg < (uint)_last_machine_leaf && Type::mreg2type[_ideal_reg], "in bounds");
560 return Type::mreg2type[_ideal_reg];
561 }
562
563 const TypePtr *MachProjNode::adr_type() const {
564 if (bottom_type() == Type::MEMORY) {
565 // in(0) might be a narrow MemBar; otherwise we will report TypePtr::BOTTOM
566 const TypePtr* adr_type = in(0)->adr_type();
567 #ifdef ASSERT
568 if (!is_error_reported() && !Node::in_dump())
569 assert(adr_type != NULL, "source must have adr_type");
570 #endif
571 return adr_type;
572 }
573 assert(bottom_type()->base() != Type::Memory, "no other memories?");
574 return NULL;
575 }
576
577 #ifndef PRODUCT
578 void MachProjNode::dump_spec(outputStream *st) const {
579 ProjNode::dump_spec(st);
580 switch (_ideal_reg) {
581 case unmatched_proj: st->print("/unmatched"); break;
582 case fat_proj: st->print("/fat"); if (WizardMode) _rout.dump(); break;
583 }
584 }
585 #endif
586
587 //=============================================================================
588 #ifndef PRODUCT
589 void MachIfNode::dump_spec(outputStream *st) const {
590 st->print("P=%f, C=%f",_prob, _fcnt);
591 }
592 #endif
593
594 //=============================================================================
595 uint MachReturnNode::size_of() const { return sizeof(*this); }
596
597 //------------------------------Registers--------------------------------------
598 const RegMask &MachReturnNode::in_RegMask( uint idx ) const {
599 return _in_rms[idx];
600 }
601
602 const TypePtr *MachReturnNode::adr_type() const {
603 // most returns and calls are assumed to consume & modify all of memory
604 // the matcher will copy non-wide adr_types from ideal originals
605 return _adr_type;
606 }
607
608 //=============================================================================
609 const Type *MachSafePointNode::bottom_type() const { return TypeTuple::MEMBAR; }
610
611 //------------------------------Registers--------------------------------------
612 const RegMask &MachSafePointNode::in_RegMask( uint idx ) const {
613 // Values in the domain use the users calling convention, embodied in the
614 // _in_rms array of RegMasks.
615 if( idx < TypeFunc::Parms ) return _in_rms[idx];
616
617 if (SafePointNode::needs_polling_address_input() &&
618 idx == TypeFunc::Parms &&
619 ideal_Opcode() == Op_SafePoint) {
620 return MachNode::in_RegMask(idx);
621 }
622
623 // Values outside the domain represent debug info
624 return *Compile::current()->matcher()->idealreg2spillmask[in(idx)->ideal_reg()];
625 }
626
627
628 //=============================================================================
629
630 uint MachCallNode::cmp( const Node &n ) const
631 { return _tf == ((MachCallNode&)n)._tf; }
632 const Type *MachCallNode::bottom_type() const { return tf()->range(); }
633 const Type *MachCallNode::Value(PhaseTransform *phase) const { return tf()->range(); }
634
635 #ifndef PRODUCT
636 void MachCallNode::dump_spec(outputStream *st) const {
637 st->print("# ");
638 tf()->dump_on(st);
639 if (_cnt != COUNT_UNKNOWN) st->print(" C=%f",_cnt);
640 if (jvms() != NULL) jvms()->dump_spec(st);
641 }
642 #endif
643
644 bool MachCallNode::return_value_is_used() const {
645 if (tf()->range()->cnt() == TypeFunc::Parms) {
646 // void return
647 return false;
648 }
649
650 // find the projection corresponding to the return value
651 for (DUIterator_Fast imax, i = fast_outs(imax); i < imax; i++) {
652 Node *use = fast_out(i);
653 if (!use->is_Proj()) continue;
654 if (use->as_Proj()->_con == TypeFunc::Parms) {
655 return true;
656 }
657 }
658 return false;
659 }
660
661 // Similar to cousin class CallNode::returns_pointer
662 // Because this is used in deoptimization, we want the type info, not the data
663 // flow info; the interpreter will "use" things that are dead to the optimizer.
664 bool MachCallNode::returns_pointer() const {
665 const TypeTuple *r = tf()->range();
666 return (r->cnt() > TypeFunc::Parms &&
667 r->field_at(TypeFunc::Parms)->isa_ptr());
668 }
669
670 //------------------------------Registers--------------------------------------
671 const RegMask &MachCallNode::in_RegMask(uint idx) const {
672 // Values in the domain use the users calling convention, embodied in the
673 // _in_rms array of RegMasks.
674 if (idx < tf()->domain()->cnt()) {
675 return _in_rms[idx];
676 }
677 if (idx == mach_constant_base_node_input()) {
678 return MachConstantBaseNode::static_out_RegMask();
679 }
680 // Values outside the domain represent debug info
681 return *Compile::current()->matcher()->idealreg2debugmask[in(idx)->ideal_reg()];
682 }
683
684 //=============================================================================
685 uint MachCallJavaNode::size_of() const { return sizeof(*this); }
686 uint MachCallJavaNode::cmp( const Node &n ) const {
687 MachCallJavaNode &call = (MachCallJavaNode&)n;
688 return MachCallNode::cmp(call) && _method->equals(call._method);
689 }
690 #ifndef PRODUCT
691 void MachCallJavaNode::dump_spec(outputStream *st) const {
692 if (_method_handle_invoke)
693 st->print("MethodHandle ");
694 if (_method) {
695 _method->print_short_name(st);
696 st->print(" ");
697 }
698 MachCallNode::dump_spec(st);
699 }
700 #endif
701
702 //------------------------------Registers--------------------------------------
703 const RegMask &MachCallJavaNode::in_RegMask(uint idx) const {
704 // Values in the domain use the users calling convention, embodied in the
705 // _in_rms array of RegMasks.
706 if (idx < tf()->domain()->cnt()) {
707 return _in_rms[idx];
708 }
709 if (idx == mach_constant_base_node_input()) {
710 return MachConstantBaseNode::static_out_RegMask();
711 }
712 // Values outside the domain represent debug info
713 Matcher* m = Compile::current()->matcher();
714 // If this call is a MethodHandle invoke we have to use a different
715 // debugmask which does not include the register we use to save the
716 // SP over MH invokes.
717 RegMask** debugmask = _method_handle_invoke ? m->idealreg2mhdebugmask : m->idealreg2debugmask;
718 return *debugmask[in(idx)->ideal_reg()];
719 }
720
721 //=============================================================================
722 uint MachCallStaticJavaNode::size_of() const { return sizeof(*this); }
723 uint MachCallStaticJavaNode::cmp( const Node &n ) const {
724 MachCallStaticJavaNode &call = (MachCallStaticJavaNode&)n;
725 return MachCallJavaNode::cmp(call) && _name == call._name;
726 }
727
728 //----------------------------uncommon_trap_request----------------------------
729 // If this is an uncommon trap, return the request code, else zero.
730 int MachCallStaticJavaNode::uncommon_trap_request() const {
731 if (_name != NULL && !strcmp(_name, "uncommon_trap")) {
732 return CallStaticJavaNode::extract_uncommon_trap_request(this);
733 }
734 return 0;
735 }
736
737 #ifndef PRODUCT
738 // Helper for summarizing uncommon_trap arguments.
739 void MachCallStaticJavaNode::dump_trap_args(outputStream *st) const {
740 int trap_req = uncommon_trap_request();
741 if (trap_req != 0) {
742 char buf[100];
743 st->print("(%s)",
744 Deoptimization::format_trap_request(buf, sizeof(buf),
745 trap_req));
746 }
747 }
748
749 void MachCallStaticJavaNode::dump_spec(outputStream *st) const {
750 st->print("Static ");
751 if (_name != NULL) {
752 st->print("wrapper for: %s", _name );
753 dump_trap_args(st);
754 st->print(" ");
755 }
756 MachCallJavaNode::dump_spec(st);
757 }
758 #endif
759
760 //=============================================================================
761 #ifndef PRODUCT
762 void MachCallDynamicJavaNode::dump_spec(outputStream *st) const {
763 st->print("Dynamic ");
764 MachCallJavaNode::dump_spec(st);
765 }
766 #endif
767 //=============================================================================
768 uint MachCallRuntimeNode::size_of() const { return sizeof(*this); }
769 uint MachCallRuntimeNode::cmp( const Node &n ) const {
770 MachCallRuntimeNode &call = (MachCallRuntimeNode&)n;
771 return MachCallNode::cmp(call) && !strcmp(_name,call._name);
772 }
773 #ifndef PRODUCT
774 void MachCallRuntimeNode::dump_spec(outputStream *st) const {
775 st->print("%s ",_name);
776 MachCallNode::dump_spec(st);
777 }
778 #endif
779 //=============================================================================
780 // A shared JVMState for all HaltNodes. Indicates the start of debug info
781 // is at TypeFunc::Parms. Only required for SOE register spill handling -
782 // to indicate where the stack-slot-only debug info inputs begin.
783 // There is no other JVM state needed here.
784 JVMState jvms_for_throw(0);
785 JVMState *MachHaltNode::jvms() const {
786 return &jvms_for_throw;
787 }
788
789 uint MachMemBarNode::size_of() const { return sizeof(*this); }
790
791 const TypePtr *MachMemBarNode::adr_type() const {
792 return _adr_type;
793 }
794
795
796 //=============================================================================
797 #ifndef PRODUCT
798 void labelOper::int_format(PhaseRegAlloc *ra, const MachNode *node, outputStream *st) const {
799 st->print("B%d", _block_num);
800 }
801 #endif // PRODUCT
802
803 //=============================================================================
804 #ifndef PRODUCT
805 void methodOper::int_format(PhaseRegAlloc *ra, const MachNode *node, outputStream *st) const {
806 st->print(INTPTR_FORMAT, _method);
807 }
808 #endif // PRODUCT