1 /*
2 * Copyright (c) 2005, 2016, 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 #ifndef SHARE_VM_C1_C1_LIRGENERATOR_HPP
26 #define SHARE_VM_C1_C1_LIRGENERATOR_HPP
27
28 #include "c1/c1_Instruction.hpp"
29 #include "c1/c1_LIR.hpp"
30 #include "ci/ciMethodData.hpp"
31 #if INCLUDE_JFR
32 #include "jfr/support/jfrIntrinsics.hpp"
33 #endif
34 #include "utilities/sizes.hpp"
35
36 // The classes responsible for code emission and register allocation
37
38
39 class LIRGenerator;
40 class LIREmitter;
41 class Invoke;
42 class SwitchRange;
43 class LIRItem;
44
45 define_array(LIRItemArray, LIRItem*)
46 define_stack(LIRItemList, LIRItemArray)
47
48 class SwitchRange: public CompilationResourceObj {
49 private:
50 int _low_key;
51 int _high_key;
52 BlockBegin* _sux;
53 public:
54 SwitchRange(int start_key, BlockBegin* sux): _low_key(start_key), _high_key(start_key), _sux(sux) {}
55 void set_high_key(int key) { _high_key = key; }
56
57 int high_key() const { return _high_key; }
58 int low_key() const { return _low_key; }
59 BlockBegin* sux() const { return _sux; }
60 };
61
62 define_array(SwitchRangeArray, SwitchRange*)
63 define_stack(SwitchRangeList, SwitchRangeArray)
64
65
66 class ResolveNode;
67
68 define_array(NodeArray, ResolveNode*);
69 define_stack(NodeList, NodeArray);
70
71
72 // Node objects form a directed graph of LIR_Opr
73 // Edges between Nodes represent moves from one Node to its destinations
74 class ResolveNode: public CompilationResourceObj {
75 private:
76 LIR_Opr _operand; // the source or destinaton
77 NodeList _destinations; // for the operand
78 bool _assigned; // Value assigned to this Node?
79 bool _visited; // Node already visited?
80 bool _start_node; // Start node already visited?
81
82 public:
83 ResolveNode(LIR_Opr operand)
84 : _operand(operand)
85 , _assigned(false)
86 , _visited(false)
87 , _start_node(false) {};
88
89 // accessors
90 LIR_Opr operand() const { return _operand; }
91 int no_of_destinations() const { return _destinations.length(); }
92 ResolveNode* destination_at(int i) { return _destinations[i]; }
93 bool assigned() const { return _assigned; }
94 bool visited() const { return _visited; }
95 bool start_node() const { return _start_node; }
96
97 // modifiers
98 void append(ResolveNode* dest) { _destinations.append(dest); }
99 void set_assigned() { _assigned = true; }
100 void set_visited() { _visited = true; }
101 void set_start_node() { _start_node = true; }
102 };
103
104
105 // This is shared state to be used by the PhiResolver so the operand
106 // arrays don't have to be reallocated for reach resolution.
107 class PhiResolverState: public CompilationResourceObj {
108 friend class PhiResolver;
109
110 private:
111 NodeList _virtual_operands; // Nodes where the operand is a virtual register
112 NodeList _other_operands; // Nodes where the operand is not a virtual register
113 NodeList _vreg_table; // Mapping from virtual register to Node
114
115 public:
116 PhiResolverState() {}
117
118 void reset(int max_vregs);
119 };
120
121
122 // class used to move value of phi operand to phi function
123 class PhiResolver: public CompilationResourceObj {
124 private:
125 LIRGenerator* _gen;
126 PhiResolverState& _state; // temporary state cached by LIRGenerator
127
128 ResolveNode* _loop;
129 LIR_Opr _temp;
130
131 // access to shared state arrays
132 NodeList& virtual_operands() { return _state._virtual_operands; }
133 NodeList& other_operands() { return _state._other_operands; }
134 NodeList& vreg_table() { return _state._vreg_table; }
135
136 ResolveNode* create_node(LIR_Opr opr, bool source);
137 ResolveNode* source_node(LIR_Opr opr) { return create_node(opr, true); }
138 ResolveNode* destination_node(LIR_Opr opr) { return create_node(opr, false); }
139
140 void emit_move(LIR_Opr src, LIR_Opr dest);
141 void move_to_temp(LIR_Opr src);
142 void move_temp_to(LIR_Opr dest);
143 void move(ResolveNode* src, ResolveNode* dest);
144
145 LIRGenerator* gen() {
146 return _gen;
147 }
148
149 public:
150 PhiResolver(LIRGenerator* _lir_gen, int max_vregs);
151 ~PhiResolver();
152
153 void move(LIR_Opr src, LIR_Opr dest);
154 };
155
156
157 // only the classes below belong in the same file
158 class LIRGenerator: public InstructionVisitor, public BlockClosure {
159
160 private:
161 Compilation* _compilation;
162 ciMethod* _method; // method that we are compiling
163 PhiResolverState _resolver_state;
164 BlockBegin* _block;
165 int _virtual_register_number;
166 Values _instruction_for_operand;
167 BitMap2D _vreg_flags; // flags which can be set on a per-vreg basis
168 LIR_List* _lir;
169 BarrierSet* _bs;
170
171 LIRGenerator* gen() {
172 return this;
173 }
174
175 void print_if_not_loaded(const NewInstance* new_instance) PRODUCT_RETURN;
176
177 #ifdef ASSERT
178 LIR_List* lir(const char * file, int line) const {
179 _lir->set_file_and_line(file, line);
180 return _lir;
181 }
182 #endif
183 LIR_List* lir() const {
184 return _lir;
185 }
186
187 // a simple cache of constants used within a block
188 GrowableArray<LIR_Const*> _constants;
189 LIR_OprList _reg_for_constants;
190 Values _unpinned_constants;
191
192 friend class PhiResolver;
193
194 // unified bailout support
195 void bailout(const char* msg) const { compilation()->bailout(msg); }
196 bool bailed_out() const { return compilation()->bailed_out(); }
197
198 void block_do_prolog(BlockBegin* block);
199 void block_do_epilog(BlockBegin* block);
200
201 // register allocation
202 LIR_Opr rlock(Value instr); // lock a free register
203 LIR_Opr rlock_result(Value instr);
204 LIR_Opr rlock_result(Value instr, BasicType type);
205 LIR_Opr rlock_byte(BasicType type);
206 LIR_Opr rlock_callee_saved(BasicType type);
207
208 // get a constant into a register and get track of what register was used
209 LIR_Opr load_constant(Constant* x);
210 LIR_Opr load_constant(LIR_Const* constant);
211
212 // Given an immediate value, return an operand usable in logical ops.
213 LIR_Opr load_immediate(int x, BasicType type);
214
215 void set_result(Value x, LIR_Opr opr) {
216 assert(opr->is_valid(), "must set to valid value");
217 assert(x->operand()->is_illegal(), "operand should never change");
218 assert(!opr->is_register() || opr->is_virtual(), "should never set result to a physical register");
219 x->set_operand(opr);
220 assert(opr == x->operand(), "must be");
221 if (opr->is_virtual()) {
222 _instruction_for_operand.at_put_grow(opr->vreg_number(), x, NULL);
223 }
224 }
225 void set_no_result(Value x) { assert(!x->has_uses(), "can't have use"); x->clear_operand(); }
226
227 friend class LIRItem;
228
229 LIR_Opr round_item(LIR_Opr opr);
230 LIR_Opr force_to_spill(LIR_Opr value, BasicType t);
231
232 PhiResolverState& resolver_state() { return _resolver_state; }
233
234 void move_to_phi(PhiResolver* resolver, Value cur_val, Value sux_val);
235 void move_to_phi(ValueStack* cur_state);
236
237 // code emission
238 void do_ArithmeticOp_Long (ArithmeticOp* x);
239 void do_ArithmeticOp_Int (ArithmeticOp* x);
240 void do_ArithmeticOp_FPU (ArithmeticOp* x);
241
242 // platform dependent
243 LIR_Opr getThreadPointer();
244
245 void do_RegisterFinalizer(Intrinsic* x);
246 void do_isInstance(Intrinsic* x);
247 void do_getClass(Intrinsic* x);
248 void do_currentThread(Intrinsic* x);
249 void do_MathIntrinsic(Intrinsic* x);
250 void do_ArrayCopy(Intrinsic* x);
251 void do_CompareAndSwap(Intrinsic* x, ValueType* type);
252 void do_NIOCheckIndex(Intrinsic* x);
253 void do_FPIntrinsics(Intrinsic* x);
254 void do_Reference_get(Intrinsic* x);
255 void do_update_CRC32(Intrinsic* x);
256
257 void do_UnsafePrefetch(UnsafePrefetch* x, bool is_store);
258
259 LIR_Opr call_runtime(BasicTypeArray* signature, LIRItemList* args, address entry, ValueType* result_type, CodeEmitInfo* info);
260 LIR_Opr call_runtime(BasicTypeArray* signature, LIR_OprList* args, address entry, ValueType* result_type, CodeEmitInfo* info);
261
262 // convenience functions
263 LIR_Opr call_runtime(Value arg1, address entry, ValueType* result_type, CodeEmitInfo* info);
264 LIR_Opr call_runtime(Value arg1, Value arg2, address entry, ValueType* result_type, CodeEmitInfo* info);
265
266 // GC Barriers
267
268 // generic interface
269
270 void pre_barrier(LIR_Opr addr_opr, LIR_Opr pre_val, bool do_load, bool patch, CodeEmitInfo* info);
271 void post_barrier(LIR_OprDesc* addr, LIR_OprDesc* new_val);
272
273 // specific implementations
274 // pre barriers
275
276 void G1SATBCardTableModRef_pre_barrier(LIR_Opr addr_opr, LIR_Opr pre_val,
277 bool do_load, bool patch, CodeEmitInfo* info);
278
279 // post barriers
280
281 void G1SATBCardTableModRef_post_barrier(LIR_OprDesc* addr, LIR_OprDesc* new_val);
282 void CardTableModRef_post_barrier(LIR_OprDesc* addr, LIR_OprDesc* new_val);
283 #ifdef CARDTABLEMODREF_POST_BARRIER_HELPER
284 void CardTableModRef_post_barrier_helper(LIR_OprDesc* addr, LIR_Const* card_table_base);
285 #endif
286
287
288 static LIR_Opr result_register_for(ValueType* type, bool callee = false);
289
290 ciObject* get_jobject_constant(Value value);
291
292 LIRItemList* invoke_visit_arguments(Invoke* x);
293 void invoke_load_arguments(Invoke* x, LIRItemList* args, const LIR_OprList* arg_list);
294
295 void trace_block_entry(BlockBegin* block);
296
297 // volatile field operations are never patchable because a klass
298 // must be loaded to know it's volatile which means that the offset
299 // it always known as well.
300 void volatile_field_store(LIR_Opr value, LIR_Address* address, CodeEmitInfo* info);
301 void volatile_field_load(LIR_Address* address, LIR_Opr result, CodeEmitInfo* info);
302
303 void put_Object_unsafe(LIR_Opr src, LIR_Opr offset, LIR_Opr data, BasicType type, bool is_volatile);
304 void get_Object_unsafe(LIR_Opr dest, LIR_Opr src, LIR_Opr offset, BasicType type, bool is_volatile);
305
306 void arithmetic_call_op (Bytecodes::Code code, LIR_Opr result, LIR_OprList* args);
307
308 void increment_counter(address counter, BasicType type, int step = 1);
309 void increment_counter(LIR_Address* addr, int step = 1);
310
311 // is_strictfp is only needed for mul and div (and only generates different code on i486)
312 void arithmetic_op(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, bool is_strictfp, LIR_Opr tmp, CodeEmitInfo* info = NULL);
313 // machine dependent. returns true if it emitted code for the multiply
314 bool strength_reduce_multiply(LIR_Opr left, int constant, LIR_Opr result, LIR_Opr tmp);
315
316 void store_stack_parameter (LIR_Opr opr, ByteSize offset_from_sp_in_bytes);
317
318 void klass2reg_with_patching(LIR_Opr r, ciMetadata* obj, CodeEmitInfo* info, bool need_resolve = false);
319
320 // this loads the length and compares against the index
321 void array_range_check (LIR_Opr array, LIR_Opr index, CodeEmitInfo* null_check_info, CodeEmitInfo* range_check_info);
322 // For java.nio.Buffer.checkIndex
323 void nio_range_check (LIR_Opr buffer, LIR_Opr index, LIR_Opr result, CodeEmitInfo* info);
324
325 void arithmetic_op_int (Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, LIR_Opr tmp);
326 void arithmetic_op_long (Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, CodeEmitInfo* info = NULL);
327 void arithmetic_op_fpu (Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, bool is_strictfp, LIR_Opr tmp = LIR_OprFact::illegalOpr);
328
329 void shift_op (Bytecodes::Code code, LIR_Opr dst_reg, LIR_Opr value, LIR_Opr count, LIR_Opr tmp);
330
331 void logic_op (Bytecodes::Code code, LIR_Opr dst_reg, LIR_Opr left, LIR_Opr right);
332
333 void monitor_enter (LIR_Opr object, LIR_Opr lock, LIR_Opr hdr, LIR_Opr scratch, int monitor_no, CodeEmitInfo* info_for_exception, CodeEmitInfo* info);
334 void monitor_exit (LIR_Opr object, LIR_Opr lock, LIR_Opr hdr, LIR_Opr scratch, int monitor_no);
335
336 void new_instance (LIR_Opr dst, ciInstanceKlass* klass, bool is_unresolved, LIR_Opr scratch1, LIR_Opr scratch2, LIR_Opr scratch3, LIR_Opr scratch4, LIR_Opr klass_reg, CodeEmitInfo* info);
337
338 // machine dependent
339 void cmp_mem_int(LIR_Condition condition, LIR_Opr base, int disp, int c, CodeEmitInfo* info);
340 void cmp_reg_mem(LIR_Condition condition, LIR_Opr reg, LIR_Opr base, int disp, BasicType type, CodeEmitInfo* info);
341 void cmp_reg_mem(LIR_Condition condition, LIR_Opr reg, LIR_Opr base, LIR_Opr disp, BasicType type, CodeEmitInfo* info);
342
343 void arraycopy_helper(Intrinsic* x, int* flags, ciArrayKlass** expected_type);
344
345 // returns a LIR_Address to address an array location. May also
346 // emit some code as part of address calculation. If
347 // needs_card_mark is true then compute the full address for use by
348 // both the store and the card mark.
349 LIR_Address* generate_address(LIR_Opr base,
350 LIR_Opr index, int shift,
351 int disp,
352 BasicType type);
353 LIR_Address* generate_address(LIR_Opr base, int disp, BasicType type) {
354 return generate_address(base, LIR_OprFact::illegalOpr, 0, disp, type);
355 }
356 LIR_Address* emit_array_address(LIR_Opr array_opr, LIR_Opr index_opr, BasicType type, bool needs_card_mark);
357
358 // the helper for generate_address
359 void add_large_constant(LIR_Opr src, int c, LIR_Opr dest);
360
361 // machine preferences and characteristics
362 bool can_inline_as_constant(Value i) const;
363 bool can_inline_as_constant(LIR_Const* c) const;
364 bool can_store_as_constant(Value i, BasicType type) const;
365
366 LIR_Opr safepoint_poll_register();
367
368 void profile_branch(If* if_instr, If::Condition cond);
369 void increment_event_counter_impl(CodeEmitInfo* info,
370 ciMethod *method, int frequency,
371 int bci, bool backedge, bool notify);
372 void increment_event_counter(CodeEmitInfo* info, int bci, bool backedge);
373 void increment_invocation_counter(CodeEmitInfo *info) {
374 if (compilation()->count_invocations()) {
375 increment_event_counter(info, InvocationEntryBci, false);
376 }
377 }
378 void increment_backedge_counter(CodeEmitInfo* info, int bci) {
379 if (compilation()->count_backedges()) {
380 increment_event_counter(info, bci, true);
381 }
382 }
383
384 CodeEmitInfo* state_for(Instruction* x, ValueStack* state, bool ignore_xhandler = false);
385 CodeEmitInfo* state_for(Instruction* x);
386
387 // allocates a virtual register for this instruction if
388 // one isn't already allocated. Only for Phi and Local.
389 LIR_Opr operand_for_instruction(Instruction *x);
390
391 void set_block(BlockBegin* block) { _block = block; }
392
393 void block_prolog(BlockBegin* block);
394 void block_epilog(BlockBegin* block);
395
396 void do_root (Instruction* instr);
397 void walk (Instruction* instr);
398
399 void bind_block_entry(BlockBegin* block);
400 void start_block(BlockBegin* block);
401
402 LIR_Opr new_register(BasicType type);
403 LIR_Opr new_register(Value value) { return new_register(as_BasicType(value->type())); }
404 LIR_Opr new_register(ValueType* type) { return new_register(as_BasicType(type)); }
405
406 // returns a register suitable for doing pointer math
407 LIR_Opr new_pointer_register() {
408 #ifdef _LP64
409 return new_register(T_LONG);
410 #else
411 return new_register(T_INT);
412 #endif
413 }
414
415 static LIR_Condition lir_cond(If::Condition cond) {
416 LIR_Condition l = lir_cond_unknown;
417 switch (cond) {
418 case If::eql: l = lir_cond_equal; break;
419 case If::neq: l = lir_cond_notEqual; break;
420 case If::lss: l = lir_cond_less; break;
421 case If::leq: l = lir_cond_lessEqual; break;
422 case If::geq: l = lir_cond_greaterEqual; break;
423 case If::gtr: l = lir_cond_greater; break;
424 case If::aeq: l = lir_cond_aboveEqual; break;
425 case If::beq: l = lir_cond_belowEqual; break;
426 default: fatal("You must pass valid If::Condition");
427 };
428 return l;
429 }
430
431 #ifdef __SOFTFP__
432 void do_soft_float_compare(If *x);
433 #endif // __SOFTFP__
434
435 void init();
436
437 SwitchRangeArray* create_lookup_ranges(TableSwitch* x);
438 SwitchRangeArray* create_lookup_ranges(LookupSwitch* x);
439 void do_SwitchRanges(SwitchRangeArray* x, LIR_Opr value, BlockBegin* default_sux);
440
441 void do_RuntimeCall(address routine, int expected_arguments, Intrinsic* x);
442 #ifdef JFR_HAVE_INTRINSICS
443 void do_ClassIDIntrinsic(Intrinsic* x);
444 void do_getEventWriter(Intrinsic* x);
445 #endif
446 ciKlass* profile_type(ciMethodData* md, int md_first_offset, int md_offset, intptr_t profiled_k,
447 Value arg, LIR_Opr& mdp, bool not_null, ciKlass* signature_at_call_k,
448 ciKlass* callee_signature_k);
449 void profile_arguments(ProfileCall* x);
450 void profile_parameters(Base* x);
451 void profile_parameters_at_call(ProfileCall* x);
452 LIR_Opr maybe_mask_boolean(StoreIndexed* x, LIR_Opr array, LIR_Opr value, CodeEmitInfo*& null_check_info);
453
454 public:
455 Compilation* compilation() const { return _compilation; }
456 FrameMap* frame_map() const { return _compilation->frame_map(); }
457 ciMethod* method() const { return _method; }
458 BlockBegin* block() const { return _block; }
459 IRScope* scope() const { return block()->scope(); }
460
461 int max_virtual_register_number() const { return _virtual_register_number; }
462
463 void block_do(BlockBegin* block);
464
465 // Flags that can be set on vregs
466 enum VregFlag {
467 must_start_in_memory = 0 // needs to be assigned a memory location at beginning, but may then be loaded in a register
468 , callee_saved = 1 // must be in a callee saved register
469 , byte_reg = 2 // must be in a byte register
470 , num_vreg_flags
471
472 };
473
474 LIRGenerator(Compilation* compilation, ciMethod* method)
475 : _compilation(compilation)
476 , _method(method)
477 , _virtual_register_number(LIR_OprDesc::vreg_base)
478 , _vreg_flags(NULL, 0, num_vreg_flags) {
479 init();
480 }
481
482 // for virtual registers, maps them back to Phi's or Local's
483 Instruction* instruction_for_opr(LIR_Opr opr);
484 Instruction* instruction_for_vreg(int reg_num);
485
486 void set_vreg_flag (int vreg_num, VregFlag f);
487 bool is_vreg_flag_set(int vreg_num, VregFlag f);
488 void set_vreg_flag (LIR_Opr opr, VregFlag f) { set_vreg_flag(opr->vreg_number(), f); }
489 bool is_vreg_flag_set(LIR_Opr opr, VregFlag f) { return is_vreg_flag_set(opr->vreg_number(), f); }
490
491 // statics
492 static LIR_Opr exceptionOopOpr();
493 static LIR_Opr exceptionPcOpr();
494 static LIR_Opr divInOpr();
495 static LIR_Opr divOutOpr();
496 static LIR_Opr remOutOpr();
497 static LIR_Opr shiftCountOpr();
498 LIR_Opr syncTempOpr();
499 LIR_Opr atomicLockOpr();
500
501 // returns a register suitable for saving the thread in a
502 // call_runtime_leaf if one is needed.
503 LIR_Opr getThreadTemp();
504
505 // visitor functionality
506 virtual void do_Phi (Phi* x);
507 virtual void do_Local (Local* x);
508 virtual void do_Constant (Constant* x);
509 virtual void do_LoadField (LoadField* x);
510 virtual void do_StoreField (StoreField* x);
511 virtual void do_ArrayLength (ArrayLength* x);
512 virtual void do_LoadIndexed (LoadIndexed* x);
513 virtual void do_StoreIndexed (StoreIndexed* x);
514 virtual void do_NegateOp (NegateOp* x);
515 virtual void do_ArithmeticOp (ArithmeticOp* x);
516 virtual void do_ShiftOp (ShiftOp* x);
517 virtual void do_LogicOp (LogicOp* x);
518 virtual void do_CompareOp (CompareOp* x);
519 virtual void do_IfOp (IfOp* x);
520 virtual void do_Convert (Convert* x);
521 virtual void do_NullCheck (NullCheck* x);
522 virtual void do_TypeCast (TypeCast* x);
523 virtual void do_Invoke (Invoke* x);
524 virtual void do_NewInstance (NewInstance* x);
525 virtual void do_NewTypeArray (NewTypeArray* x);
526 virtual void do_NewObjectArray (NewObjectArray* x);
527 virtual void do_NewMultiArray (NewMultiArray* x);
528 virtual void do_CheckCast (CheckCast* x);
529 virtual void do_InstanceOf (InstanceOf* x);
530 virtual void do_MonitorEnter (MonitorEnter* x);
531 virtual void do_MonitorExit (MonitorExit* x);
532 virtual void do_Intrinsic (Intrinsic* x);
533 virtual void do_BlockBegin (BlockBegin* x);
534 virtual void do_Goto (Goto* x);
535 virtual void do_If (If* x);
536 virtual void do_IfInstanceOf (IfInstanceOf* x);
537 virtual void do_TableSwitch (TableSwitch* x);
538 virtual void do_LookupSwitch (LookupSwitch* x);
539 virtual void do_Return (Return* x);
540 virtual void do_Throw (Throw* x);
541 virtual void do_Base (Base* x);
542 virtual void do_OsrEntry (OsrEntry* x);
543 virtual void do_ExceptionObject(ExceptionObject* x);
544 virtual void do_RoundFP (RoundFP* x);
545 virtual void do_UnsafeGetRaw (UnsafeGetRaw* x);
546 virtual void do_UnsafePutRaw (UnsafePutRaw* x);
547 virtual void do_UnsafeGetObject(UnsafeGetObject* x);
548 virtual void do_UnsafePutObject(UnsafePutObject* x);
549 virtual void do_UnsafeGetAndSetObject(UnsafeGetAndSetObject* x);
550 virtual void do_UnsafePrefetchRead (UnsafePrefetchRead* x);
551 virtual void do_UnsafePrefetchWrite(UnsafePrefetchWrite* x);
552 virtual void do_ProfileCall (ProfileCall* x);
553 virtual void do_ProfileReturnType (ProfileReturnType* x);
554 virtual void do_ProfileInvoke (ProfileInvoke* x);
555 virtual void do_RuntimeCall (RuntimeCall* x);
556 virtual void do_MemBar (MemBar* x);
557 virtual void do_RangeCheckPredicate(RangeCheckPredicate* x);
558 #ifdef ASSERT
559 virtual void do_Assert (Assert* x);
560 #endif
561
562 #ifdef C1_LIRGENERATOR_MD_HPP
563 #include C1_LIRGENERATOR_MD_HPP
564 #endif
565 };
566
567
568 class LIRItem: public CompilationResourceObj {
569 private:
570 Value _value;
571 LIRGenerator* _gen;
572 LIR_Opr _result;
573 bool _destroys_register;
574 LIR_Opr _new_result;
575
576 LIRGenerator* gen() const { return _gen; }
577
578 public:
579 LIRItem(Value value, LIRGenerator* gen) {
580 _destroys_register = false;
581 _gen = gen;
582 set_instruction(value);
583 }
584
585 LIRItem(LIRGenerator* gen) {
586 _destroys_register = false;
587 _gen = gen;
588 _result = LIR_OprFact::illegalOpr;
589 set_instruction(NULL);
590 }
591
592 void set_instruction(Value value) {
593 _value = value;
594 _result = LIR_OprFact::illegalOpr;
595 if (_value != NULL) {
596 _gen->walk(_value);
597 _result = _value->operand();
598 }
599 _new_result = LIR_OprFact::illegalOpr;
600 }
601
602 Value value() const { return _value; }
603 ValueType* type() const { return value()->type(); }
604 LIR_Opr result() {
605 assert(!_destroys_register || (!_result->is_register() || _result->is_virtual()),
606 "shouldn't use set_destroys_register with physical regsiters");
607 if (_destroys_register && _result->is_register()) {
608 if (_new_result->is_illegal()) {
609 _new_result = _gen->new_register(type());
610 gen()->lir()->move(_result, _new_result);
611 }
612 return _new_result;
613 } else {
614 return _result;
615 }
616 return _result;
617 }
618
619 void set_result(LIR_Opr opr);
620
621 void load_item();
622 void load_byte_item();
623 void load_nonconstant();
624 // load any values which can't be expressed as part of a single store instruction
625 void load_for_store(BasicType store_type);
626 void load_item_force(LIR_Opr reg);
627
628 void dont_load_item() {
629 // do nothing
630 }
631
632 void set_destroys_register() {
633 _destroys_register = true;
634 }
635
636 bool is_constant() const { return value()->as_Constant() != NULL; }
637 bool is_stack() { return result()->is_stack(); }
638 bool is_register() { return result()->is_register(); }
639
640 ciObject* get_jobject_constant() const;
641 jint get_jint_constant() const;
642 jlong get_jlong_constant() const;
643 jfloat get_jfloat_constant() const;
644 jdouble get_jdouble_constant() const;
645 jint get_address_constant() const;
646 };
647
648 #endif // SHARE_VM_C1_C1_LIRGENERATOR_HPP