1 /*
2 * Copyright (c) 1997, 2024, 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/shared/barrierSet.hpp"
27 #include "gc/shared/c2/barrierSetC2.hpp"
28 #include "gc/shared/collectedHeap.hpp"
29 #include "memory/universe.hpp"
30 #include "oops/compressedOops.hpp"
31 #include "opto/machnode.hpp"
32 #include "opto/output.hpp"
33 #include "opto/regalloc.hpp"
34 #include "utilities/vmError.hpp"
35
36 //=============================================================================
37 // Return the value requested
38 // result register lookup, corresponding to int_format
39 int MachOper::reg(PhaseRegAlloc *ra_, const Node *node) const {
40 return (int)ra_->get_encode(node);
41 }
42 // input register lookup, corresponding to ext_format
43 int MachOper::reg(PhaseRegAlloc *ra_, const Node *node, int idx) const {
44 return (int)(ra_->get_encode(node->in(idx)));
45 }
46 intptr_t MachOper::constant() const { return 0x00; }
47 relocInfo::relocType MachOper::constant_reloc() const { return relocInfo::none; }
48 jdouble MachOper::constantD() const { ShouldNotReachHere(); return 0.0; }
49 jfloat MachOper::constantF() const { ShouldNotReachHere(); return 0.0; }
50 jlong MachOper::constantL() const { ShouldNotReachHere(); return CONST64(0) ; }
51 TypeOopPtr *MachOper::oop() const { return nullptr; }
52 int MachOper::ccode() const { return 0x00; }
53 // A zero, default, indicates this value is not needed.
54 // May need to lookup the base register, as done in int_ and ext_format
55 int MachOper::base (PhaseRegAlloc *ra_, const Node *node, int idx) const { return 0x00; }
56 int MachOper::index(PhaseRegAlloc *ra_, const Node *node, int idx) const { return 0x00; }
57 int MachOper::scale() const { return 0x00; }
58 int MachOper::disp (PhaseRegAlloc *ra_, const Node *node, int idx) const { return 0x00; }
59 int MachOper::constant_disp() const { return 0; }
60 int MachOper::base_position() const { return -1; } // no base input
61 int MachOper::index_position() const { return -1; } // no index input
62 // Check for PC-Relative displacement
63 relocInfo::relocType MachOper::disp_reloc() const { return relocInfo::none; }
64 // Return the label
65 Label* MachOper::label() const { ShouldNotReachHere(); return 0; }
66 intptr_t MachOper::method() const { ShouldNotReachHere(); return 0; }
67
68
69 //------------------------------negate-----------------------------------------
70 // Negate conditional branches. Error for non-branch operands
71 void MachOper::negate() {
72 ShouldNotCallThis();
73 }
74
75 //-----------------------------type--------------------------------------------
76 const Type *MachOper::type() const {
77 return Type::BOTTOM;
78 }
79
80 //------------------------------in_RegMask-------------------------------------
81 const RegMask *MachOper::in_RegMask(int index) const {
82 ShouldNotReachHere();
83 return nullptr;
84 }
85
86 //------------------------------dump_spec--------------------------------------
87 // Print any per-operand special info
88 #ifndef PRODUCT
89 void MachOper::dump_spec(outputStream *st) const { }
90 #endif
91
92 //------------------------------hash-------------------------------------------
93 // Print any per-operand special info
94 uint MachOper::hash() const {
95 ShouldNotCallThis();
96 return 5;
97 }
98
99 //------------------------------cmp--------------------------------------------
100 // Print any per-operand special info
101 bool MachOper::cmp( const MachOper &oper ) const {
102 ShouldNotCallThis();
103 return opcode() == oper.opcode();
104 }
105
106 //------------------------------hash-------------------------------------------
107 // Print any per-operand special info
108 uint labelOper::hash() const {
109 return _block_num;
110 }
111
112 //------------------------------cmp--------------------------------------------
113 // Print any per-operand special info
114 bool labelOper::cmp( const MachOper &oper ) const {
115 return (opcode() == oper.opcode()) && (_label == oper.label());
116 }
117
118 //------------------------------hash-------------------------------------------
119 // Print any per-operand special info
120 uint methodOper::hash() const {
121 return (uint)_method;
122 }
123
124 //------------------------------cmp--------------------------------------------
125 // Print any per-operand special info
126 bool methodOper::cmp( const MachOper &oper ) const {
127 return (opcode() == oper.opcode()) && (_method == oper.method());
128 }
129
130
131 //=============================================================================
132 //------------------------------MachNode---------------------------------------
133
134 //------------------------------emit-------------------------------------------
135 void MachNode::emit(C2_MacroAssembler *masm, PhaseRegAlloc *ra_) const {
136 #ifdef ASSERT
137 tty->print("missing MachNode emit function: ");
138 dump();
139 #endif
140 ShouldNotCallThis();
141 }
142
143 //---------------------------postalloc_expand----------------------------------
144 // Expand node after register allocation.
145 void MachNode::postalloc_expand(GrowableArray <Node *> *nodes, PhaseRegAlloc *ra_) {}
146
147 //------------------------------size-------------------------------------------
148 // Size of instruction in bytes
149 uint MachNode::size(PhaseRegAlloc *ra_) const {
150 // If a virtual was not defined for this specific instruction,
151 // Call the helper which finds the size by emitting the bits.
152 return MachNode::emit_size(ra_);
153 }
154
155 //------------------------------size-------------------------------------------
156 // Helper function that computes size by emitting code
157 uint MachNode::emit_size(PhaseRegAlloc *ra_) const {
158 // Emit into a trash buffer and count bytes emitted.
159 assert(ra_ == ra_->C->regalloc(), "sanity");
160 return ra_->C->output()->scratch_emit_size(this);
161 }
162
163
164
165 //------------------------------hash-------------------------------------------
166 uint MachNode::hash() const {
167 uint no = num_opnds();
168 uint sum = rule();
169 for( uint i=0; i<no; i++ )
170 sum += _opnds[i]->hash();
171 return sum+Node::hash();
172 }
173
174 //-----------------------------cmp---------------------------------------------
175 bool MachNode::cmp( const Node &node ) const {
176 MachNode& n = *((Node&)node).as_Mach();
177 uint no = num_opnds();
178 if( no != n.num_opnds() ) return false;
179 if( rule() != n.rule() ) return false;
180 for( uint i=0; i<no; i++ ) // All operands must match
181 if( !_opnds[i]->cmp( *n._opnds[i] ) )
182 return false; // mis-matched operands
183 return true; // match
184 }
185
186 void MachNode::fill_new_machnode(MachNode* node) const {
187 // New node must use same node index
188 node->set_idx(_idx);
189 // Copy machine-independent inputs
190 for (uint j = 0; j < req(); j++) {
191 node->add_req(in(j));
192 }
193 // Copy my operands, except for cisc position
194 int nopnds = num_opnds();
195 assert(node->num_opnds() == (uint)nopnds, "Must have same number of operands");
196 MachOper** to = node->_opnds;
197 for (int i = 0; i < nopnds; i++) {
198 if (i != cisc_operand()) {
199 to[i] = _opnds[i]->clone();
200 }
201 }
202 // Do not increment node index counter, since node reuses my index
203 Compile* C = Compile::current();
204 C->set_unique(C->unique() - 1);
205 }
206
207 // Return an equivalent instruction using memory for cisc_operand position
208 MachNode *MachNode::cisc_version(int offset) {
209 ShouldNotCallThis();
210 return nullptr;
211 }
212
213 void MachNode::use_cisc_RegMask() {
214 ShouldNotReachHere();
215 }
216
217
218 //-----------------------------in_RegMask--------------------------------------
219 const RegMask &MachNode::in_RegMask( uint idx ) const {
220 uint numopnds = num_opnds(); // Virtual call for number of operands
221 uint skipped = oper_input_base(); // Sum of leaves skipped so far
222 if( idx < skipped ) {
223 assert( ideal_Opcode() == Op_AddP, "expected base ptr here" );
224 assert( idx == 1, "expected base ptr here" );
225 // debug info can be anywhere
226 return *Compile::current()->matcher()->idealreg2spillmask[Op_RegP];
227 }
228 uint opcnt = 1; // First operand
229 uint num_edges = _opnds[1]->num_edges(); // leaves for first operand
230 while( idx >= skipped+num_edges ) {
231 skipped += num_edges;
232 opcnt++; // Bump operand count
233 assert( opcnt < numopnds, "Accessing non-existent operand" );
234 num_edges = _opnds[opcnt]->num_edges(); // leaves for next operand
235 }
236
237 const RegMask *rm = cisc_RegMask();
238 if( rm == nullptr || (int)opcnt != cisc_operand() ) {
239 rm = _opnds[opcnt]->in_RegMask(idx-skipped);
240 }
241 return *rm;
242 }
243
244 //-----------------------------memory_inputs--------------------------------
245 const MachOper* MachNode::memory_inputs(Node* &base, Node* &index) const {
246 const MachOper* oper = memory_operand();
247
248 if (oper == (MachOper*)-1) {
249 base = NodeSentinel;
250 index = NodeSentinel;
251 } else {
252 base = nullptr;
253 index = nullptr;
254 if (oper != nullptr) {
255 // It has a unique memory operand. Find its index.
256 int oper_idx = num_opnds();
257 while (--oper_idx >= 0) {
258 if (_opnds[oper_idx] == oper) break;
259 }
260 int oper_pos = operand_index(oper_idx);
261 int base_pos = oper->base_position();
262 if (base_pos >= 0) {
263 base = _in[oper_pos+base_pos];
264 }
265 int index_pos = oper->index_position();
266 if (index_pos >= 0) {
267 index = _in[oper_pos+index_pos];
268 }
269 }
270 }
271
272 return oper;
273 }
274
275 //-----------------------------get_base_and_disp----------------------------
276 const Node* MachNode::get_base_and_disp(intptr_t &offset, const TypePtr* &adr_type) const {
277
278 // Find the memory inputs using our helper function
279 Node* base;
280 Node* index;
281 const MachOper* oper = memory_inputs(base, index);
282
283 if (oper == nullptr) {
284 // Base has been set to null
285 offset = 0;
286 } else if (oper == (MachOper*)-1) {
287 // Base has been set to NodeSentinel
288 // There is not a unique memory use here. We will fall to AliasIdxBot.
289 offset = Type::OffsetBot;
290 } else {
291 // Base may be null, even if offset turns out to be != 0
292
293 intptr_t disp = oper->constant_disp();
294 int scale = oper->scale();
295 // Now we have collected every part of the ADLC MEMORY_INTER.
296 // See if it adds up to a base + offset.
297 if (index != nullptr) {
298 const Type* t_index = index->bottom_type();
299 if (t_index->isa_narrowoop() || t_index->isa_narrowklass()) { // EncodeN, LoadN, LoadConN, LoadNKlass,
300 // EncodeNKlass, LoadConNklass.
301 // Memory references through narrow oops have a
302 // funny base so grab the type from the index:
303 // [R12 + narrow_oop_reg<<3 + offset]
304 assert(base == nullptr, "Memory references through narrow oops have no base");
305 offset = disp;
306 adr_type = t_index->make_ptr()->add_offset(offset);
307 return nullptr;
308 } else if (!index->is_Con()) {
309 disp = Type::OffsetBot;
310 } else if (disp != Type::OffsetBot) {
311 const TypeX* ti = t_index->isa_intptr_t();
312 if (ti == nullptr) {
313 disp = Type::OffsetBot; // a random constant??
314 } else {
315 disp += ti->get_con() << scale;
316 }
317 }
318 }
319 offset = disp;
320
321 // In x86_32.ad, indOffset32X uses base==RegI and disp==RegP,
322 // this will prevent alias analysis without the following support:
323 // Lookup the TypePtr used by indOffset32X, a compile-time constant oop,
324 // Add the offset determined by the "base", or use Type::OffsetBot.
325 if( adr_type == TYPE_PTR_SENTINAL ) {
326 const TypePtr *t_disp = oper->disp_as_type(); // only not null for indOffset32X
327 if (t_disp != nullptr) {
328 offset = Type::OffsetBot;
329 const Type* t_base = base->bottom_type();
330 if (t_base->isa_intptr_t()) {
331 const TypeX *t_offset = t_base->is_intptr_t();
332 if( t_offset->is_con() ) {
333 offset = t_offset->get_con();
334 }
335 }
336 adr_type = t_disp->add_offset(offset);
337 } else if( base == nullptr && offset != 0 && offset != Type::OffsetBot ) {
338 // Use ideal type if it is oop ptr.
339 const TypePtr *tp = oper->type()->isa_ptr();
340 if( tp != nullptr) {
341 adr_type = tp;
342 }
343 }
344 }
345
346 }
347 return base;
348 }
349
350
351 //---------------------------------adr_type---------------------------------
352 const class TypePtr *MachNode::adr_type() const {
353 intptr_t offset = 0;
354 const TypePtr *adr_type = TYPE_PTR_SENTINAL; // attempt computing adr_type
355 const Node *base = get_base_and_disp(offset, adr_type);
356 if( adr_type != TYPE_PTR_SENTINAL ) {
357 return adr_type; // get_base_and_disp has the answer
358 }
359
360 #ifdef ASSERT
361 if (base != nullptr && base->is_Mach() && base->as_Mach()->ideal_Opcode() == Op_VerifyVectorAlignment) {
362 // For VerifyVectorAlignment we just pass the type through
363 return base->bottom_type()->is_ptr();
364 }
365 #endif
366
367 // Direct addressing modes have no base node, simply an indirect
368 // offset, which is always to raw memory.
369 // %%%%% Someday we'd like to allow constant oop offsets which
370 // would let Intel load from static globals in 1 instruction.
371 // Currently Intel requires 2 instructions and a register temp.
372 if (base == nullptr) {
373 // null base, zero offset means no memory at all (a null pointer!)
374 if (offset == 0) {
375 return nullptr;
376 }
377 // null base, any offset means any pointer whatever
378 if (offset == Type::OffsetBot) {
379 return TypePtr::BOTTOM;
380 }
381 // %%% make offset be intptr_t
382 assert(!Universe::heap()->is_in(cast_to_oop(offset)), "must be a raw ptr");
383 return TypeRawPtr::BOTTOM;
384 }
385
386 // base of -1 with no particular offset means all of memory
387 if (base == NodeSentinel) return TypePtr::BOTTOM;
388
389 const Type* t = base->bottom_type();
390 if (t->isa_narrowoop() && CompressedOops::shift() == 0) {
391 // 32-bit unscaled narrow oop can be the base of any address expression
392 t = t->make_ptr();
393 }
394 if (t->isa_narrowklass() && CompressedKlassPointers::shift() == 0) {
395 // 32-bit unscaled narrow oop can be the base of any address expression
396 t = t->make_ptr();
397 }
398 if (t->isa_intptr_t() && offset != 0 && offset != Type::OffsetBot) {
399 // We cannot assert that the offset does not look oop-ish here.
400 // Depending on the heap layout the cardmark base could land
401 // inside some oopish region. It definitely does for Win2K.
402 // The sum of cardmark-base plus shift-by-9-oop lands outside
403 // the oop-ish area but we can't assert for that statically.
404 return TypeRawPtr::BOTTOM;
405 }
406
407 const TypePtr *tp = t->isa_ptr();
408
409 // be conservative if we do not recognize the type
410 if (tp == nullptr) {
411 assert(false, "this path may produce not optimal code");
412 return TypePtr::BOTTOM;
413 }
414 assert(tp->base() != Type::AnyPtr, "not a bare pointer");
415
416 return tp->add_offset(offset);
417 }
418
419
420 //-----------------------------operand_index---------------------------------
421 int MachNode::operand_index(uint operand) const {
422 if (operand < 1) return -1;
423 assert(operand < num_opnds(), "oob");
424 if (_opnds[operand]->num_edges() == 0) return -1;
425
426 uint skipped = oper_input_base(); // Sum of leaves skipped so far
427 for (uint opcnt = 1; opcnt < operand; opcnt++) {
428 uint num_edges = _opnds[opcnt]->num_edges(); // leaves for operand
429 skipped += num_edges;
430 }
431 return skipped;
432 }
433
434 int MachNode::operand_index(const MachOper *oper) const {
435 uint skipped = oper_input_base(); // Sum of leaves skipped so far
436 uint opcnt;
437 for (opcnt = 1; opcnt < num_opnds(); opcnt++) {
438 if (_opnds[opcnt] == oper) break;
439 uint num_edges = _opnds[opcnt]->num_edges(); // leaves for operand
440 skipped += num_edges;
441 }
442 if (_opnds[opcnt] != oper) return -1;
443 return skipped;
444 }
445
446 int MachNode::operand_index(Node* def) const {
447 uint skipped = oper_input_base(); // Sum of leaves skipped so far
448 for (uint opcnt = 1; opcnt < num_opnds(); opcnt++) {
449 uint num_edges = _opnds[opcnt]->num_edges(); // leaves for operand
450 for (uint i = 0; i < num_edges; i++) {
451 if (in(skipped + i) == def) {
452 return opcnt;
453 }
454 }
455 skipped += num_edges;
456 }
457 return -1;
458 }
459
460 //------------------------------peephole---------------------------------------
461 // Apply peephole rule(s) to this instruction
462 int MachNode::peephole(Block *block, int block_index, PhaseCFG* cfg_, PhaseRegAlloc *ra_) {
463 return -1;
464 }
465
466 //------------------------------add_case_label---------------------------------
467 // Adds the label for the case
468 void MachNode::add_case_label( int index_num, Label* blockLabel) {
469 ShouldNotCallThis();
470 }
471
472 //------------------------------method_set-------------------------------------
473 // Set the absolute address of a method
474 void MachNode::method_set( intptr_t addr ) {
475 ShouldNotCallThis();
476 }
477
478 //------------------------------rematerialize----------------------------------
479 bool MachNode::rematerialize() const {
480 // Temps are always rematerializable
481 if (is_MachTemp()) return true;
482
483 uint r = rule(); // Match rule
484 if (r < Matcher::_begin_rematerialize ||
485 r >= Matcher::_end_rematerialize) {
486 return false;
487 }
488
489 // For 2-address instructions, the input live range is also the output
490 // live range. Remateralizing does not make progress on the that live range.
491 if (two_adr()) return false;
492
493 // Check for rematerializing float constants, or not
494 if (!Matcher::rematerialize_float_constants) {
495 int op = ideal_Opcode();
496 if (op == Op_ConF || op == Op_ConD) {
497 return false;
498 }
499 }
500
501 // Defining flags - can't spill these! Must remateralize.
502 if (ideal_reg() == Op_RegFlags) {
503 return true;
504 }
505
506 // Stretching lots of inputs - don't do it.
507 // A MachContant has the last input being the constant base
508 if (req() > (is_MachConstant() ? 3U : 2U)) {
509 return false;
510 }
511
512 if (req() >= 2 && in(1) && in(1)->ideal_reg() == Op_RegFlags) {
513 // In(1) will be rematerialized, too.
514 // Stretching lots of inputs - don't do it.
515 if (in(1)->req() > (in(1)->is_MachConstant() ? 3U : 2U)) {
516 return false;
517 }
518 }
519
520 // Don't remateralize somebody with bound inputs - it stretches a
521 // fixed register lifetime.
522 uint idx = oper_input_base();
523 if (req() > idx) {
524 const RegMask &rm = in_RegMask(idx);
525 if (rm.is_NotEmpty() && rm.is_bound(ideal_reg())) {
526 return false;
527 }
528 }
529
530 return true;
531 }
532
533 #ifndef PRODUCT
534 //------------------------------dump_spec--------------------------------------
535 // Print any per-operand special info
536 void MachNode::dump_spec(outputStream *st) const {
537 uint cnt = num_opnds();
538 for( uint i=0; i<cnt; i++ ) {
539 if (_opnds[i] != nullptr) {
540 _opnds[i]->dump_spec(st);
541 } else {
542 st->print(" _");
543 }
544 }
545 const TypePtr *t = adr_type();
546 if( t ) {
547 Compile* C = Compile::current();
548 if( C->alias_type(t)->is_volatile() )
549 st->print(" Volatile!");
550 }
551 if (barrier_data() != 0) {
552 st->print(" barrier(");
553 BarrierSet::barrier_set()->barrier_set_c2()->dump_barrier_data(this, st);
554 st->print(") ");
555 }
556 }
557
558 //------------------------------dump_format------------------------------------
559 // access to virtual
560 void MachNode::dump_format(PhaseRegAlloc *ra, outputStream *st) const {
561 format(ra, st); // access to virtual
562 }
563 #endif
564
565 //=============================================================================
566 #ifndef PRODUCT
567 void MachTypeNode::dump_spec(outputStream *st) const {
568 MachNode::dump_spec(st);
569 if (_bottom_type != nullptr) {
570 _bottom_type->dump_on(st);
571 } else {
572 st->print(" null");
573 }
574 }
575 #endif
576
577
578 //=============================================================================
579 int MachConstantNode::constant_offset() {
580 // Bind the offset lazily.
581 if (_constant.offset() == -1) {
582 ConstantTable& constant_table = Compile::current()->output()->constant_table();
583 int offset = constant_table.find_offset(_constant);
584 // If called from Compile::scratch_emit_size return the
585 // pre-calculated offset.
586 // NOTE: If the AD file does some table base offset optimizations
587 // later the AD file needs to take care of this fact.
588 if (Compile::current()->output()->in_scratch_emit_size()) {
589 return constant_table.calculate_table_base_offset() + offset;
590 }
591 _constant.set_offset(constant_table.table_base_offset() + offset);
592 }
593 return _constant.offset();
594 }
595
596 int MachConstantNode::constant_offset_unchecked() const {
597 return _constant.offset();
598 }
599
600 //=============================================================================
601 #ifndef PRODUCT
602 void MachNullCheckNode::format( PhaseRegAlloc *ra_, outputStream *st ) const {
603 int reg = ra_->get_reg_first(in(1)->in(_vidx));
604 st->print("%s %s", Name(), Matcher::regName[reg]);
605 }
606 #endif
607
608 void MachNullCheckNode::emit(C2_MacroAssembler *masm, PhaseRegAlloc *ra_) const {
609 // only emits entries in the null-pointer exception handler table
610 }
611 void MachNullCheckNode::label_set(Label* label, uint block_num) {
612 // Nothing to emit
613 }
614 void MachNullCheckNode::save_label( Label** label, uint* block_num ) {
615 // Nothing to emit
616 }
617
618 const RegMask &MachNullCheckNode::in_RegMask( uint idx ) const {
619 if( idx == 0 ) return RegMask::Empty;
620 else return in(1)->as_Mach()->out_RegMask();
621 }
622
623 //=============================================================================
624 const Type *MachProjNode::bottom_type() const {
625 if( _ideal_reg == fat_proj ) return Type::BOTTOM;
626 // Try the normal mechanism first
627 const Type *t = in(0)->bottom_type();
628 if( t->base() == Type::Tuple ) {
629 const TypeTuple *tt = t->is_tuple();
630 if (_con < tt->cnt())
631 return tt->field_at(_con);
632 }
633 // Else use generic type from ideal register set
634 assert((uint)_ideal_reg < (uint)_last_machine_leaf && Type::mreg2type[_ideal_reg], "in bounds");
635 return Type::mreg2type[_ideal_reg];
636 }
637
638 const TypePtr *MachProjNode::adr_type() const {
639 if (bottom_type() == Type::MEMORY) {
640 // in(0) might be a narrow MemBar; otherwise we will report TypePtr::BOTTOM
641 Node* ctrl = in(0);
642 if (ctrl == nullptr) return nullptr; // node is dead
643 const TypePtr* adr_type = ctrl->adr_type();
644 #ifdef ASSERT
645 if (!VMError::is_error_reported() && !Node::in_dump())
646 assert(adr_type != nullptr, "source must have adr_type");
647 #endif
648 return adr_type;
649 }
650 assert(bottom_type()->base() != Type::Memory, "no other memories?");
651 return nullptr;
652 }
653
654 #ifndef PRODUCT
655 void MachProjNode::dump_spec(outputStream *st) const {
656 ProjNode::dump_spec(st);
657 switch (_ideal_reg) {
658 case unmatched_proj: st->print("/unmatched"); break;
659 case fat_proj: st->print("/fat"); if (WizardMode) _rout.dump(st); break;
660 }
661 }
662 #endif
663
664 //=============================================================================
665 #ifndef PRODUCT
666 void MachIfNode::dump_spec(outputStream *st) const {
667 st->print("P=%f, C=%f",_prob, _fcnt);
668 }
669 #endif
670
671 //=============================================================================
672 uint MachReturnNode::size_of() const { return sizeof(*this); }
673
674 //------------------------------Registers--------------------------------------
675 const RegMask &MachReturnNode::in_RegMask( uint idx ) const {
676 return _in_rms[idx];
677 }
678
679 const TypePtr *MachReturnNode::adr_type() const {
680 // most returns and calls are assumed to consume & modify all of memory
681 // the matcher will copy non-wide adr_types from ideal originals
682 return _adr_type;
683 }
684
685 //=============================================================================
686 const Type *MachSafePointNode::bottom_type() const { return TypeTuple::MEMBAR; }
687
688 //------------------------------Registers--------------------------------------
689 const RegMask &MachSafePointNode::in_RegMask( uint idx ) const {
690 // Values in the domain use the users calling convention, embodied in the
691 // _in_rms array of RegMasks.
692 if( idx < TypeFunc::Parms ) return _in_rms[idx];
693
694 if (idx == TypeFunc::Parms &&
695 ideal_Opcode() == Op_SafePoint) {
696 return MachNode::in_RegMask(idx);
697 }
698
699 // Values outside the domain represent debug info
700 assert(in(idx)->ideal_reg() != Op_RegFlags, "flags register is not spillable");
701 return *Compile::current()->matcher()->idealreg2spillmask[in(idx)->ideal_reg()];
702 }
703
704
705 //=============================================================================
706
707 bool MachCallNode::cmp( const Node &n ) const
708 { return _tf == ((MachCallNode&)n)._tf; }
709 const Type *MachCallNode::bottom_type() const { return tf()->range(); }
710 const Type* MachCallNode::Value(PhaseGVN* phase) const { return tf()->range(); }
711
712 #ifndef PRODUCT
713 void MachCallNode::dump_spec(outputStream *st) const {
714 st->print("# ");
715 if (tf() != nullptr) tf()->dump_on(st);
716 if (_cnt != COUNT_UNKNOWN) st->print(" C=%f",_cnt);
717 if (jvms() != nullptr) jvms()->dump_spec(st);
718 }
719 #endif
720
721 #ifndef _LP64
722 bool MachCallNode::return_value_is_used() const {
723 if (tf()->range()->cnt() == TypeFunc::Parms) {
724 // void return
725 return false;
726 }
727
728 // find the projection corresponding to the return value
729 for (DUIterator_Fast imax, i = fast_outs(imax); i < imax; i++) {
730 Node *use = fast_out(i);
731 if (!use->is_Proj()) continue;
732 if (use->as_Proj()->_con == TypeFunc::Parms) {
733 return true;
734 }
735 }
736 return false;
737 }
738 #endif
739
740 // Similar to cousin class CallNode::returns_pointer
741 // Because this is used in deoptimization, we want the type info, not the data
742 // flow info; the interpreter will "use" things that are dead to the optimizer.
743 bool MachCallNode::returns_pointer() const {
744 const TypeTuple *r = tf()->range();
745 return (r->cnt() > TypeFunc::Parms &&
746 r->field_at(TypeFunc::Parms)->isa_ptr());
747 }
748
749 //------------------------------Registers--------------------------------------
750 const RegMask &MachCallNode::in_RegMask(uint idx) const {
751 // Values in the domain use the users calling convention, embodied in the
752 // _in_rms array of RegMasks.
753 if (idx < tf()->domain()->cnt()) {
754 return _in_rms[idx];
755 }
756 if (idx == mach_constant_base_node_input()) {
757 return MachConstantBaseNode::static_out_RegMask();
758 }
759 // Values outside the domain represent debug info
760 return *Compile::current()->matcher()->idealreg2debugmask[in(idx)->ideal_reg()];
761 }
762
763 //=============================================================================
764 uint MachCallJavaNode::size_of() const { return sizeof(*this); }
765 bool MachCallJavaNode::cmp( const Node &n ) const {
766 MachCallJavaNode &call = (MachCallJavaNode&)n;
767 return MachCallNode::cmp(call) && _method->equals(call._method) &&
768 _override_symbolic_info == call._override_symbolic_info;
769 }
770 #ifndef PRODUCT
771 void MachCallJavaNode::dump_spec(outputStream *st) const {
772 if (_method_handle_invoke)
773 st->print("MethodHandle ");
774 if (_method) {
775 _method->print_short_name(st);
776 st->print(" ");
777 }
778 MachCallNode::dump_spec(st);
779 }
780 #endif
781
782 //------------------------------Registers--------------------------------------
783 const RegMask &MachCallJavaNode::in_RegMask(uint idx) const {
784 // Values in the domain use the users calling convention, embodied in the
785 // _in_rms array of RegMasks.
786 if (idx < tf()->domain()->cnt()) {
787 return _in_rms[idx];
788 }
789 if (idx == mach_constant_base_node_input()) {
790 return MachConstantBaseNode::static_out_RegMask();
791 }
792 // Values outside the domain represent debug info
793 Matcher* m = Compile::current()->matcher();
794 // If this call is a MethodHandle invoke we have to use a different
795 // debugmask which does not include the register we use to save the
796 // SP over MH invokes.
797 RegMask** debugmask = _method_handle_invoke ? m->idealreg2mhdebugmask : m->idealreg2debugmask;
798 return *debugmask[in(idx)->ideal_reg()];
799 }
800
801 //=============================================================================
802 uint MachCallStaticJavaNode::size_of() const { return sizeof(*this); }
803 bool MachCallStaticJavaNode::cmp( const Node &n ) const {
804 MachCallStaticJavaNode &call = (MachCallStaticJavaNode&)n;
805 return MachCallJavaNode::cmp(call) && _name == call._name;
806 }
807
808 //----------------------------uncommon_trap_request----------------------------
809 // If this is an uncommon trap, return the request code, else zero.
810 int MachCallStaticJavaNode::uncommon_trap_request() const {
811 if (_name != nullptr && !strcmp(_name, "uncommon_trap")) {
812 return CallStaticJavaNode::extract_uncommon_trap_request(this);
813 }
814 return 0;
815 }
816
817 #ifndef PRODUCT
818 // Helper for summarizing uncommon_trap arguments.
819 void MachCallStaticJavaNode::dump_trap_args(outputStream *st) const {
820 int trap_req = uncommon_trap_request();
821 if (trap_req != 0) {
822 char buf[100];
823 st->print("(%s)",
824 Deoptimization::format_trap_request(buf, sizeof(buf),
825 trap_req));
826 }
827 }
828
829 void MachCallStaticJavaNode::dump_spec(outputStream *st) const {
830 st->print("Static ");
831 if (_name != nullptr) {
832 st->print("wrapper for: %s", _name );
833 dump_trap_args(st);
834 st->print(" ");
835 }
836 MachCallJavaNode::dump_spec(st);
837 }
838 #endif
839
840 //=============================================================================
841 #ifndef PRODUCT
842 void MachCallDynamicJavaNode::dump_spec(outputStream *st) const {
843 st->print("Dynamic ");
844 MachCallJavaNode::dump_spec(st);
845 }
846 #endif
847 //=============================================================================
848 uint MachCallRuntimeNode::size_of() const { return sizeof(*this); }
849 bool MachCallRuntimeNode::cmp( const Node &n ) const {
850 MachCallRuntimeNode &call = (MachCallRuntimeNode&)n;
851 return MachCallNode::cmp(call) && !strcmp(_name,call._name);
852 }
853 #ifndef PRODUCT
854 void MachCallRuntimeNode::dump_spec(outputStream *st) const {
855 st->print("%s ",_name);
856 MachCallNode::dump_spec(st);
857 }
858 #endif
859 //=============================================================================
860 // A shared JVMState for all HaltNodes. Indicates the start of debug info
861 // is at TypeFunc::Parms. Only required for SOE register spill handling -
862 // to indicate where the stack-slot-only debug info inputs begin.
863 // There is no other JVM state needed here.
864 JVMState jvms_for_throw(0);
865 JVMState *MachHaltNode::jvms() const {
866 return &jvms_for_throw;
867 }
868
869 uint MachMemBarNode::size_of() const { return sizeof(*this); }
870
871 const TypePtr *MachMemBarNode::adr_type() const {
872 return _adr_type;
873 }
874
875
876 //=============================================================================
877 #ifndef PRODUCT
878 void labelOper::int_format(PhaseRegAlloc *ra, const MachNode *node, outputStream *st) const {
879 st->print("B%d", _block_num);
880 }
881 #endif // PRODUCT
882
883 //=============================================================================
884 #ifndef PRODUCT
885 void methodOper::int_format(PhaseRegAlloc *ra, const MachNode *node, outputStream *st) const {
886 st->print(INTPTR_FORMAT, _method);
887 }
888 #endif // PRODUCT