1 /*
2 * Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "asm/assembler.inline.hpp"
27 #include "c1/c1_Compilation.hpp"
28 #include "c1/c1_Instruction.hpp"
29 #include "c1/c1_InstructionPrinter.hpp"
30 #include "c1/c1_LIRAssembler.hpp"
31 #include "c1/c1_MacroAssembler.hpp"
32 #include "c1/c1_ValueStack.hpp"
33 #include "ci/ciInstance.hpp"
34 #include "ci/ciValueKlass.hpp"
35 #include "gc/shared/barrierSet.hpp"
36 #include "runtime/os.hpp"
37 #include "runtime/sharedRuntime.hpp"
38
39 void LIR_Assembler::patching_epilog(PatchingStub* patch, LIR_PatchCode patch_code, Register obj, CodeEmitInfo* info) {
40 // We must have enough patching space so that call can be inserted.
41 // We cannot use fat nops here, since the concurrent code rewrite may transiently
42 // create the illegal instruction sequence.
43 while ((intx) _masm->pc() - (intx) patch->pc_start() < NativeGeneralJump::instruction_size) {
44 _masm->nop();
45 }
46 patch->install(_masm, patch_code, obj, info);
47 append_code_stub(patch);
48
49 #ifdef ASSERT
50 Bytecodes::Code code = info->scope()->method()->java_code_at_bci(info->stack()->bci());
51 if (patch->id() == PatchingStub::access_field_id) {
52 switch (code) {
53 case Bytecodes::_putstatic:
54 case Bytecodes::_getstatic:
55 case Bytecodes::_putfield:
56 case Bytecodes::_getfield:
57 break;
58 default:
59 ShouldNotReachHere();
60 }
61 } else if (patch->id() == PatchingStub::load_klass_id) {
62 switch (code) {
63 case Bytecodes::_new:
64 case Bytecodes::_defaultvalue:
65 case Bytecodes::_anewarray:
66 case Bytecodes::_multianewarray:
67 case Bytecodes::_instanceof:
68 case Bytecodes::_checkcast:
69 break;
70 default:
71 ShouldNotReachHere();
72 }
73 } else if (patch->id() == PatchingStub::load_mirror_id) {
74 switch (code) {
75 case Bytecodes::_putstatic:
76 case Bytecodes::_getstatic:
77 case Bytecodes::_ldc:
78 case Bytecodes::_ldc_w:
79 break;
80 default:
81 ShouldNotReachHere();
82 }
83 } else if (patch->id() == PatchingStub::load_appendix_id) {
84 Bytecodes::Code bc_raw = info->scope()->method()->raw_code_at_bci(info->stack()->bci());
85 assert(Bytecodes::has_optional_appendix(bc_raw), "unexpected appendix resolution");
86 } else {
87 ShouldNotReachHere();
88 }
89 #endif
90 }
91
92 PatchingStub::PatchID LIR_Assembler::patching_id(CodeEmitInfo* info) {
93 IRScope* scope = info->scope();
94 Bytecodes::Code bc_raw = scope->method()->raw_code_at_bci(info->stack()->bci());
95 if (Bytecodes::has_optional_appendix(bc_raw)) {
96 return PatchingStub::load_appendix_id;
97 }
98 return PatchingStub::load_mirror_id;
99 }
100
101 //---------------------------------------------------------------
102
103
104 LIR_Assembler::LIR_Assembler(Compilation* c):
105 _masm(c->masm())
106 , _bs(BarrierSet::barrier_set())
107 , _compilation(c)
108 , _frame_map(c->frame_map())
109 , _current_block(NULL)
110 , _pending_non_safepoint(NULL)
111 , _pending_non_safepoint_offset(0)
112 {
113 _slow_case_stubs = new CodeStubList();
114 }
115
116
117 LIR_Assembler::~LIR_Assembler() {
118 // The unwind handler label may be unnbound if this destructor is invoked because of a bail-out.
119 // Reset it here to avoid an assertion.
120 _unwind_handler_entry.reset();
121 _verified_value_entry.reset();
122 }
123
124
125 void LIR_Assembler::check_codespace() {
126 CodeSection* cs = _masm->code_section();
127 if (cs->remaining() < (int)(NOT_LP64(1*K)LP64_ONLY(2*K))) {
128 BAILOUT("CodeBuffer overflow");
129 }
130 }
131
132
133 void LIR_Assembler::append_code_stub(CodeStub* stub) {
134 _slow_case_stubs->append(stub);
135 }
136
137 void LIR_Assembler::emit_stubs(CodeStubList* stub_list) {
138 for (int m = 0; m < stub_list->length(); m++) {
139 CodeStub* s = stub_list->at(m);
140
141 check_codespace();
142 CHECK_BAILOUT();
143
144 #ifndef PRODUCT
145 if (CommentedAssembly) {
146 stringStream st;
147 s->print_name(&st);
148 st.print(" slow case");
149 _masm->block_comment(st.as_string());
150 }
151 #endif
152 s->emit_code(this);
153 #ifdef ASSERT
154 s->assert_no_unbound_labels();
155 #endif
156 }
157 }
158
159
160 void LIR_Assembler::emit_slow_case_stubs() {
161 emit_stubs(_slow_case_stubs);
162 }
163
164
165 bool LIR_Assembler::needs_icache(ciMethod* method) const {
166 return !method->is_static();
167 }
168
169
170 int LIR_Assembler::code_offset() const {
171 return _masm->offset();
172 }
173
174
175 address LIR_Assembler::pc() const {
176 return _masm->pc();
177 }
178
179 // To bang the stack of this compiled method we use the stack size
180 // that the interpreter would need in case of a deoptimization. This
181 // removes the need to bang the stack in the deoptimization blob which
182 // in turn simplifies stack overflow handling.
183 int LIR_Assembler::bang_size_in_bytes() const {
184 return MAX2(initial_frame_size_in_bytes() + os::extra_bang_size_in_bytes(), _compilation->interpreter_frame_size());
185 }
186
187 void LIR_Assembler::emit_exception_entries(ExceptionInfoList* info_list) {
188 for (int i = 0; i < info_list->length(); i++) {
189 XHandlers* handlers = info_list->at(i)->exception_handlers();
190
191 for (int j = 0; j < handlers->length(); j++) {
192 XHandler* handler = handlers->handler_at(j);
193 assert(handler->lir_op_id() != -1, "handler not processed by LinearScan");
194 assert(handler->entry_code() == NULL ||
195 handler->entry_code()->instructions_list()->last()->code() == lir_branch ||
196 handler->entry_code()->instructions_list()->last()->code() == lir_delay_slot, "last operation must be branch");
197
198 if (handler->entry_pco() == -1) {
199 // entry code not emitted yet
200 if (handler->entry_code() != NULL && handler->entry_code()->instructions_list()->length() > 1) {
201 handler->set_entry_pco(code_offset());
202 if (CommentedAssembly) {
203 _masm->block_comment("Exception adapter block");
204 }
205 emit_lir_list(handler->entry_code());
206 } else {
207 handler->set_entry_pco(handler->entry_block()->exception_handler_pco());
208 }
209
210 assert(handler->entry_pco() != -1, "must be set now");
211 }
212 }
213 }
214 }
215
216
217 void LIR_Assembler::emit_code(BlockList* hir) {
218 if (PrintLIR) {
219 print_LIR(hir);
220 }
221
222 int n = hir->length();
223 for (int i = 0; i < n; i++) {
224 emit_block(hir->at(i));
225 CHECK_BAILOUT();
226 }
227
228 flush_debug_info(code_offset());
229
230 DEBUG_ONLY(check_no_unbound_labels());
231 }
232
233
234 void LIR_Assembler::emit_block(BlockBegin* block) {
235 if (block->is_set(BlockBegin::backward_branch_target_flag)) {
236 align_backward_branch_target();
237 }
238
239 // if this block is the start of an exception handler, record the
240 // PC offset of the first instruction for later construction of
241 // the ExceptionHandlerTable
242 if (block->is_set(BlockBegin::exception_entry_flag)) {
243 block->set_exception_handler_pco(code_offset());
244 }
245
246 #ifndef PRODUCT
247 if (PrintLIRWithAssembly) {
248 // don't print Phi's
249 InstructionPrinter ip(false);
250 block->print(ip);
251 }
252 #endif /* PRODUCT */
253
254 assert(block->lir() != NULL, "must have LIR");
255 X86_ONLY(assert(_masm->rsp_offset() == 0, "frame size should be fixed"));
256
257 #ifndef PRODUCT
258 if (CommentedAssembly) {
259 stringStream st;
260 st.print_cr(" block B%d [%d, %d]", block->block_id(), block->bci(), block->end()->printable_bci());
261 _masm->block_comment(st.as_string());
262 }
263 #endif
264
265 emit_lir_list(block->lir());
266
267 X86_ONLY(assert(_masm->rsp_offset() == 0, "frame size should be fixed"));
268 }
269
270
271 void LIR_Assembler::emit_lir_list(LIR_List* list) {
272 peephole(list);
273
274 int n = list->length();
275 for (int i = 0; i < n; i++) {
276 LIR_Op* op = list->at(i);
277
278 check_codespace();
279 CHECK_BAILOUT();
280
281 #ifndef PRODUCT
282 if (CommentedAssembly) {
283 // Don't record out every op since that's too verbose. Print
284 // branches since they include block and stub names. Also print
285 // patching moves since they generate funny looking code.
286 if (op->code() == lir_branch ||
287 (op->code() == lir_move && op->as_Op1()->patch_code() != lir_patch_none) ||
288 (op->code() == lir_leal && op->as_Op1()->patch_code() != lir_patch_none)) {
289 stringStream st;
290 op->print_on(&st);
291 _masm->block_comment(st.as_string());
292 }
293 }
294 if (PrintLIRWithAssembly) {
295 // print out the LIR operation followed by the resulting assembly
296 list->at(i)->print(); tty->cr();
297 }
298 #endif /* PRODUCT */
299
300 op->emit_code(this);
301
302 if (compilation()->debug_info_recorder()->recording_non_safepoints()) {
303 process_debug_info(op);
304 }
305
306 #ifndef PRODUCT
307 if (PrintLIRWithAssembly) {
308 _masm->code()->decode();
309 }
310 #endif /* PRODUCT */
311 }
312 }
313
314 #ifdef ASSERT
315 void LIR_Assembler::check_no_unbound_labels() {
316 CHECK_BAILOUT();
317
318 for (int i = 0; i < _branch_target_blocks.length() - 1; i++) {
319 if (!_branch_target_blocks.at(i)->label()->is_bound()) {
320 tty->print_cr("label of block B%d is not bound", _branch_target_blocks.at(i)->block_id());
321 assert(false, "unbound label");
322 }
323 }
324 }
325 #endif
326
327 //----------------------------------debug info--------------------------------
328
329
330 void LIR_Assembler::add_debug_info_for_branch(CodeEmitInfo* info) {
331 int pc_offset = code_offset();
332 flush_debug_info(pc_offset);
333 info->record_debug_info(compilation()->debug_info_recorder(), pc_offset);
334 if (info->exception_handlers() != NULL) {
335 compilation()->add_exception_handlers_for_pco(pc_offset, info->exception_handlers());
336 }
337 }
338
339
340 void LIR_Assembler::add_call_info(int pc_offset, CodeEmitInfo* cinfo) {
341 flush_debug_info(pc_offset);
342 cinfo->record_debug_info(compilation()->debug_info_recorder(), pc_offset);
343 if (cinfo->exception_handlers() != NULL) {
344 compilation()->add_exception_handlers_for_pco(pc_offset, cinfo->exception_handlers());
345 }
346 }
347
348 static ValueStack* debug_info(Instruction* ins) {
349 StateSplit* ss = ins->as_StateSplit();
350 if (ss != NULL) return ss->state();
351 return ins->state_before();
352 }
353
354 void LIR_Assembler::process_debug_info(LIR_Op* op) {
355 Instruction* src = op->source();
356 if (src == NULL) return;
357 int pc_offset = code_offset();
358 if (_pending_non_safepoint == src) {
359 _pending_non_safepoint_offset = pc_offset;
360 return;
361 }
362 ValueStack* vstack = debug_info(src);
363 if (vstack == NULL) return;
364 if (_pending_non_safepoint != NULL) {
365 // Got some old debug info. Get rid of it.
366 if (debug_info(_pending_non_safepoint) == vstack) {
367 _pending_non_safepoint_offset = pc_offset;
368 return;
369 }
370 if (_pending_non_safepoint_offset < pc_offset) {
371 record_non_safepoint_debug_info();
372 }
373 _pending_non_safepoint = NULL;
374 }
375 // Remember the debug info.
376 if (pc_offset > compilation()->debug_info_recorder()->last_pc_offset()) {
377 _pending_non_safepoint = src;
378 _pending_non_safepoint_offset = pc_offset;
379 }
380 }
381
382 // Index caller states in s, where 0 is the oldest, 1 its callee, etc.
383 // Return NULL if n is too large.
384 // Returns the caller_bci for the next-younger state, also.
385 static ValueStack* nth_oldest(ValueStack* s, int n, int& bci_result) {
386 ValueStack* t = s;
387 for (int i = 0; i < n; i++) {
388 if (t == NULL) break;
389 t = t->caller_state();
390 }
391 if (t == NULL) return NULL;
392 for (;;) {
393 ValueStack* tc = t->caller_state();
394 if (tc == NULL) return s;
395 t = tc;
396 bci_result = tc->bci();
397 s = s->caller_state();
398 }
399 }
400
401 void LIR_Assembler::record_non_safepoint_debug_info() {
402 int pc_offset = _pending_non_safepoint_offset;
403 ValueStack* vstack = debug_info(_pending_non_safepoint);
404 int bci = vstack->bci();
405
406 DebugInformationRecorder* debug_info = compilation()->debug_info_recorder();
407 assert(debug_info->recording_non_safepoints(), "sanity");
408
409 debug_info->add_non_safepoint(pc_offset);
410
411 // Visit scopes from oldest to youngest.
412 for (int n = 0; ; n++) {
413 int s_bci = bci;
414 ValueStack* s = nth_oldest(vstack, n, s_bci);
415 if (s == NULL) break;
416 IRScope* scope = s->scope();
417 //Always pass false for reexecute since these ScopeDescs are never used for deopt
418 methodHandle null_mh;
419 debug_info->describe_scope(pc_offset, null_mh, scope->method(), s->bci(), false/*reexecute*/);
420 }
421
422 debug_info->end_non_safepoint(pc_offset);
423 }
424
425
426 ImplicitNullCheckStub* LIR_Assembler::add_debug_info_for_null_check_here(CodeEmitInfo* cinfo) {
427 return add_debug_info_for_null_check(code_offset(), cinfo);
428 }
429
430 ImplicitNullCheckStub* LIR_Assembler::add_debug_info_for_null_check(int pc_offset, CodeEmitInfo* cinfo) {
431 ImplicitNullCheckStub* stub = new ImplicitNullCheckStub(pc_offset, cinfo);
432 append_code_stub(stub);
433 return stub;
434 }
435
436 void LIR_Assembler::add_debug_info_for_div0_here(CodeEmitInfo* info) {
437 add_debug_info_for_div0(code_offset(), info);
438 }
439
440 void LIR_Assembler::add_debug_info_for_div0(int pc_offset, CodeEmitInfo* cinfo) {
441 DivByZeroStub* stub = new DivByZeroStub(pc_offset, cinfo);
442 append_code_stub(stub);
443 }
444
445 void LIR_Assembler::emit_rtcall(LIR_OpRTCall* op) {
446 rt_call(op->result_opr(), op->addr(), op->arguments(), op->tmp(), op->info());
447 }
448
449
450 void LIR_Assembler::emit_call(LIR_OpJavaCall* op) {
451 verify_oop_map(op->info());
452
453 // must align calls sites, otherwise they can't be updated atomically
454 align_call(op->code());
455
456 // emit the static call stub stuff out of line
457 emit_static_call_stub();
458 CHECK_BAILOUT();
459
460 switch (op->code()) {
461 case lir_static_call:
462 case lir_dynamic_call:
463 call(op, relocInfo::static_call_type);
464 break;
465 case lir_optvirtual_call:
466 call(op, relocInfo::opt_virtual_call_type);
467 break;
468 case lir_icvirtual_call:
469 ic_call(op);
470 break;
471 case lir_virtual_call:
472 vtable_call(op);
473 break;
474 default:
475 fatal("unexpected op code: %s", op->name());
476 break;
477 }
478
479 // JSR 292
480 // Record if this method has MethodHandle invokes.
481 if (op->is_method_handle_invoke()) {
482 compilation()->set_has_method_handle_invokes(true);
483 }
484
485 ciMethod* method = op->method();
486 if (ValueTypeReturnedAsFields && method->signature()->returns_never_null()) {
487 ciType* return_type = method->return_type();
488 if (return_type->is_valuetype()) {
489 ciValueKlass* vk = return_type->as_value_klass();
490 if (vk->can_be_returned_as_fields()) {
491 store_value_type_fields_to_buf(vk);
492 }
493 }
494 }
495
496 #if defined(X86) && defined(TIERED)
497 // C2 leave fpu stack dirty clean it
498 if (UseSSE < 2) {
499 int i;
500 for ( i = 1; i <= 7 ; i++ ) {
501 ffree(i);
502 }
503 if (!op->result_opr()->is_float_kind()) {
504 ffree(0);
505 }
506 }
507 #endif // X86 && TIERED
508 }
509
510
511 void LIR_Assembler::emit_opLabel(LIR_OpLabel* op) {
512 _masm->bind (*(op->label()));
513 }
514
515
516 void LIR_Assembler::emit_op1(LIR_Op1* op) {
517 switch (op->code()) {
518 case lir_move:
519 if (op->move_kind() == lir_move_volatile) {
520 assert(op->patch_code() == lir_patch_none, "can't patch volatiles");
521 volatile_move_op(op->in_opr(), op->result_opr(), op->type(), op->info());
522 } else {
523 move_op(op->in_opr(), op->result_opr(), op->type(),
524 op->patch_code(), op->info(), op->pop_fpu_stack(),
525 op->move_kind() == lir_move_unaligned,
526 op->move_kind() == lir_move_wide);
527 }
528 break;
529
530 case lir_roundfp: {
531 LIR_OpRoundFP* round_op = op->as_OpRoundFP();
532 roundfp_op(round_op->in_opr(), round_op->tmp(), round_op->result_opr(), round_op->pop_fpu_stack());
533 break;
534 }
535
536 case lir_return:
537 return_op(op->in_opr());
538 break;
539
540 case lir_safepoint:
541 if (compilation()->debug_info_recorder()->last_pc_offset() == code_offset()) {
542 _masm->nop();
543 }
544 safepoint_poll(op->in_opr(), op->info());
545 break;
546
547 case lir_fxch:
548 fxch(op->in_opr()->as_jint());
549 break;
550
551 case lir_fld:
552 fld(op->in_opr()->as_jint());
553 break;
554
555 case lir_ffree:
556 ffree(op->in_opr()->as_jint());
557 break;
558
559 case lir_branch:
560 break;
561
562 case lir_push:
563 push(op->in_opr());
564 break;
565
566 case lir_pop:
567 pop(op->in_opr());
568 break;
569
570 case lir_leal:
571 leal(op->in_opr(), op->result_opr(), op->patch_code(), op->info());
572 break;
573
574 case lir_null_check: {
575 ImplicitNullCheckStub* stub = add_debug_info_for_null_check_here(op->info());
576
577 if (op->in_opr()->is_single_cpu()) {
578 _masm->null_check(op->in_opr()->as_register(), stub->entry());
579 } else {
580 Unimplemented();
581 }
582 break;
583 }
584
585 case lir_monaddr:
586 monitor_address(op->in_opr()->as_constant_ptr()->as_jint(), op->result_opr());
587 break;
588
589 #ifdef SPARC
590 case lir_pack64:
591 pack64(op->in_opr(), op->result_opr());
592 break;
593
594 case lir_unpack64:
595 unpack64(op->in_opr(), op->result_opr());
596 break;
597 #endif
598
599 case lir_unwind:
600 unwind_op(op->in_opr());
601 break;
602
603 default:
604 Unimplemented();
605 break;
606 }
607 }
608
609 void LIR_Assembler::add_scalarized_entry_info(int pc_offset) {
610 flush_debug_info(pc_offset);
611 DebugInformationRecorder* debug_info = compilation()->debug_info_recorder();
612 // The VEP and VVEP(RO) of a C1-compiled method call buffer_value_args_xxx()
613 // before doing any argument shuffling. This call may cause GC. When GC happens,
614 // all the parameters are still as passed by the caller, so we just use
615 // map->set_include_argument_oops() inside frame::sender_for_compiled_frame(RegisterMap* map).
616 // There's no need to build a GC map here.
617 OopMap* oop_map = new OopMap(0, 0);
618 debug_info->add_safepoint(pc_offset, oop_map);
619 DebugToken* locvals = debug_info->create_scope_values(NULL); // FIXME is this needed (for Java debugging to work properly??)
620 DebugToken* expvals = debug_info->create_scope_values(NULL); // FIXME is this needed (for Java debugging to work properly??)
621 DebugToken* monvals = debug_info->create_monitor_values(NULL); // FIXME: need testing with synchronized method
622 bool reexecute = false;
623 bool return_oop = false; // This flag will be ignored since it used only for C2 with escape analysis.
624 bool rethrow_exception = false;
625 bool is_method_handle_invoke = false;
626 debug_info->describe_scope(pc_offset, methodHandle(), method(), 0, reexecute, rethrow_exception, is_method_handle_invoke, return_oop, false, locvals, expvals, monvals);
627 debug_info->end_safepoint(pc_offset);
628 }
629
630 // Emit VEP (and VVEP/VEP_RO if necessary)
631 void LIR_Assembler::emit_std_entries() {
632 offsets()->set_value(CodeOffsets::OSR_Entry, _masm->offset());
633
634 const CompiledEntrySignature* ces = compilation()->compiled_entry_signature();
635
636 _masm->align(CodeEntryAlignment);
637 offsets()->set_value(CodeOffsets::Entry, _masm->offset());
638 if (needs_icache(compilation()->method())) {
639 check_icache();
640 }
641
642 if (ces->has_scalarized_args()) {
643 assert(ValueTypePassFieldsAsArgs && method()->get_Method()->has_scalarized_args(), "must be");
644
645 bool has_value_ro_entry = false;
646 if (ces->has_value_recv() && ces->num_value_args() > 1) {
647 // VVEP(RO) = pack all value parameters, except the <this> object.
648 has_value_ro_entry = true;
649 add_scalarized_entry_info(emit_std_entry(CodeOffsets::Verified_Value_Entry_RO, ces));
650 }
651
652 // VEP = pack all value parameters
653 _masm->align(CodeEntryAlignment);
654 add_scalarized_entry_info(emit_std_entry(CodeOffsets::Verified_Entry, ces));
655
656 _masm->align(CodeEntryAlignment);
657 offsets()->set_value(CodeOffsets::Value_Entry, _masm->offset());
658 if (needs_icache(compilation()->method())) {
659 check_icache();
660 }
661 // VVEP = all value parameters are already passed as refs, so no need for packing.
662 emit_std_entry(CodeOffsets::Verified_Value_Entry, NULL);
663
664 if (!has_value_ro_entry) {
665 if (ces->has_value_recv()) {
666 assert(ces->num_value_args() == 1, "must be");
667 offsets()->set_value(CodeOffsets::Verified_Value_Entry_RO,
668 offsets()->value(CodeOffsets::Verified_Value_Entry));
669 } else {
670 assert(ces->num_value_args() > 0, "must be");
671 offsets()->set_value(CodeOffsets::Verified_Value_Entry_RO,
672 offsets()->value(CodeOffsets::Verified_Entry));
673 }
674 }
675 } else {
676 // All 3 entries are the same (no value-type packing)
677 int offset = emit_std_entry(CodeOffsets::Verified_Value_Entry, NULL);
678 offsets()->set_value(CodeOffsets::Verified_Entry, offset);
679 offsets()->set_value(CodeOffsets::Verified_Value_Entry_RO, offset);
680 }
681 }
682
683 int LIR_Assembler::emit_std_entry(CodeOffsets::Entries entry, const CompiledEntrySignature* ces) {
684 offsets()->set_value(entry, _masm->offset());
685 switch (entry) {
686 case CodeOffsets::Verified_Entry:
687 return _masm->verified_entry(ces, initial_frame_size_in_bytes(), bang_size_in_bytes(), _verified_value_entry);
688 case CodeOffsets::Verified_Value_Entry_RO:
689 return _masm->verified_value_ro_entry(ces, initial_frame_size_in_bytes(), bang_size_in_bytes(), _verified_value_entry);
690 default:
691 {
692 int offset = _masm->offset();
693 assert(entry == CodeOffsets::Verified_Value_Entry, "must be");
694 _masm->verified_value_entry();
695 build_frame();
696 offsets()->set_value(CodeOffsets::Frame_Complete, _masm->offset());
697 return offset;
698 }
699 }
700 }
701
702 void LIR_Assembler::emit_op0(LIR_Op0* op) {
703 switch (op->code()) {
704 case lir_word_align: {
705 _masm->align(BytesPerWord);
706 break;
707 }
708
709 case lir_nop:
710 assert(op->info() == NULL, "not supported");
711 _masm->nop();
712 break;
713
714 case lir_label:
715 Unimplemented();
716 break;
717
718 case lir_build_frame:
719 build_frame();
720 break;
721
722 case lir_std_entry:
723 emit_std_entries();
724 break;
725
726 case lir_osr_entry:
727 offsets()->set_value(CodeOffsets::OSR_Entry, _masm->offset());
728 osr_entry();
729 break;
730
731 case lir_24bit_FPU:
732 set_24bit_FPU();
733 break;
734
735 case lir_reset_FPU:
736 reset_FPU();
737 break;
738
739 case lir_breakpoint:
740 breakpoint();
741 break;
742
743 case lir_fpop_raw:
744 fpop();
745 break;
746
747 case lir_membar:
748 membar();
749 break;
750
751 case lir_membar_acquire:
752 membar_acquire();
753 break;
754
755 case lir_membar_release:
756 membar_release();
757 break;
758
759 case lir_membar_loadload:
760 membar_loadload();
761 break;
762
763 case lir_membar_storestore:
764 membar_storestore();
765 break;
766
767 case lir_membar_loadstore:
768 membar_loadstore();
769 break;
770
771 case lir_membar_storeload:
772 membar_storeload();
773 break;
774
775 case lir_get_thread:
776 get_thread(op->result_opr());
777 break;
778
779 case lir_on_spin_wait:
780 on_spin_wait();
781 break;
782
783 default:
784 ShouldNotReachHere();
785 break;
786 }
787 }
788
789
790 void LIR_Assembler::emit_op2(LIR_Op2* op) {
791 switch (op->code()) {
792 case lir_cmp:
793 if (op->info() != NULL) {
794 assert(op->in_opr1()->is_address() || op->in_opr2()->is_address(),
795 "shouldn't be codeemitinfo for non-address operands");
796 add_debug_info_for_null_check_here(op->info()); // exception possible
797 }
798 comp_op(op->condition(), op->in_opr1(), op->in_opr2(), op);
799 break;
800
801 case lir_cmp_l2i:
802 case lir_cmp_fd2i:
803 case lir_ucmp_fd2i:
804 comp_fl2i(op->code(), op->in_opr1(), op->in_opr2(), op->result_opr(), op);
805 break;
806
807 case lir_cmove:
808 cmove(op->condition(), op->in_opr1(), op->in_opr2(), op->result_opr(), op->type());
809 break;
810
811 case lir_shl:
812 case lir_shr:
813 case lir_ushr:
814 if (op->in_opr2()->is_constant()) {
815 shift_op(op->code(), op->in_opr1(), op->in_opr2()->as_constant_ptr()->as_jint(), op->result_opr());
816 } else {
817 shift_op(op->code(), op->in_opr1(), op->in_opr2(), op->result_opr(), op->tmp1_opr());
818 }
819 break;
820
821 case lir_add:
822 case lir_sub:
823 case lir_mul:
824 case lir_mul_strictfp:
825 case lir_div:
826 case lir_div_strictfp:
827 case lir_rem:
828 assert(op->fpu_pop_count() < 2, "");
829 arith_op(
830 op->code(),
831 op->in_opr1(),
832 op->in_opr2(),
833 op->result_opr(),
834 op->info(),
835 op->fpu_pop_count() == 1);
836 break;
837
838 case lir_abs:
839 case lir_sqrt:
840 case lir_tan:
841 case lir_log10:
842 intrinsic_op(op->code(), op->in_opr1(), op->in_opr2(), op->result_opr(), op);
843 break;
844
845 case lir_neg:
846 negate(op->in_opr1(), op->result_opr(), op->in_opr2());
847 break;
848
849 case lir_logic_and:
850 case lir_logic_or:
851 case lir_logic_xor:
852 logic_op(
853 op->code(),
854 op->in_opr1(),
855 op->in_opr2(),
856 op->result_opr());
857 break;
858
859 case lir_throw:
860 throw_op(op->in_opr1(), op->in_opr2(), op->info());
861 break;
862
863 case lir_xadd:
864 case lir_xchg:
865 atomic_op(op->code(), op->in_opr1(), op->in_opr2(), op->result_opr(), op->tmp1_opr());
866 break;
867
868 default:
869 Unimplemented();
870 break;
871 }
872 }
873
874
875 void LIR_Assembler::build_frame() {
876 _masm->build_frame(initial_frame_size_in_bytes(), bang_size_in_bytes(),
877 compilation()->compiled_entry_signature()->c1_needs_stack_repair(),
878 &_verified_value_entry);
879 }
880
881
882 void LIR_Assembler::roundfp_op(LIR_Opr src, LIR_Opr tmp, LIR_Opr dest, bool pop_fpu_stack) {
883 assert((src->is_single_fpu() && dest->is_single_stack()) ||
884 (src->is_double_fpu() && dest->is_double_stack()),
885 "round_fp: rounds register -> stack location");
886
887 reg2stack (src, dest, src->type(), pop_fpu_stack);
888 }
889
890
891 void LIR_Assembler::move_op(LIR_Opr src, LIR_Opr dest, BasicType type, LIR_PatchCode patch_code, CodeEmitInfo* info, bool pop_fpu_stack, bool unaligned, bool wide) {
892 if (src->is_register()) {
893 if (dest->is_register()) {
894 assert(patch_code == lir_patch_none && info == NULL, "no patching and info allowed here");
895 reg2reg(src, dest);
896 } else if (dest->is_stack()) {
897 assert(patch_code == lir_patch_none && info == NULL, "no patching and info allowed here");
898 reg2stack(src, dest, type, pop_fpu_stack);
899 } else if (dest->is_address()) {
900 reg2mem(src, dest, type, patch_code, info, pop_fpu_stack, wide, unaligned);
901 } else {
902 ShouldNotReachHere();
903 }
904
905 } else if (src->is_stack()) {
906 assert(patch_code == lir_patch_none && info == NULL, "no patching and info allowed here");
907 if (dest->is_register()) {
908 stack2reg(src, dest, type);
909 } else if (dest->is_stack()) {
910 stack2stack(src, dest, type);
911 } else {
912 ShouldNotReachHere();
913 }
914
915 } else if (src->is_constant()) {
916 if (dest->is_register()) {
917 const2reg(src, dest, patch_code, info); // patching is possible
918 } else if (dest->is_stack()) {
919 assert(patch_code == lir_patch_none && info == NULL, "no patching and info allowed here");
920 const2stack(src, dest);
921 } else if (dest->is_address()) {
922 assert(patch_code == lir_patch_none, "no patching allowed here");
923 const2mem(src, dest, type, info, wide);
924 } else {
925 ShouldNotReachHere();
926 }
927
928 } else if (src->is_address()) {
929 mem2reg(src, dest, type, patch_code, info, wide, unaligned);
930
931 } else {
932 ShouldNotReachHere();
933 }
934 }
935
936
937 void LIR_Assembler::verify_oop_map(CodeEmitInfo* info) {
938 #ifndef PRODUCT
939 if (VerifyOops) {
940 OopMapStream s(info->oop_map());
941 while (!s.is_done()) {
942 OopMapValue v = s.current();
943 if (v.is_oop()) {
944 VMReg r = v.reg();
945 if (!r->is_stack()) {
946 stringStream st;
947 st.print("bad oop %s at %d", r->as_Register()->name(), _masm->offset());
948 #ifdef SPARC
949 _masm->_verify_oop(r->as_Register(), os::strdup(st.as_string(), mtCompiler), __FILE__, __LINE__);
950 #else
951 _masm->verify_oop(r->as_Register());
952 #endif
953 } else {
954 _masm->verify_stack_oop(r->reg2stack() * VMRegImpl::stack_slot_size);
955 }
956 }
957 check_codespace();
958 CHECK_BAILOUT();
959
960 s.next();
961 }
962 }
963 #endif
964 }