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 #include "jfr/support/jfrIntrinsics.hpp"
32 #include "utilities/sizes.hpp"
33
34 // The classes responsible for code emission and register allocation
35
36
37 class LIRGenerator;
38 class LIREmitter;
39 class Invoke;
40 class SwitchRange;
41 class LIRItem;
42
43 define_array(LIRItemArray, LIRItem*)
44 define_stack(LIRItemList, LIRItemArray)
45
46 class SwitchRange: public CompilationResourceObj {
47 private:
48 int _low_key;
49 int _high_key;
50 BlockBegin* _sux;
51 public:
52 SwitchRange(int start_key, BlockBegin* sux): _low_key(start_key), _high_key(start_key), _sux(sux) {}
53 void set_high_key(int key) { _high_key = key; }
54
55 int high_key() const { return _high_key; }
56 int low_key() const { return _low_key; }
57 BlockBegin* sux() const { return _sux; }
58 };
59
60 define_array(SwitchRangeArray, SwitchRange*)
61 define_stack(SwitchRangeList, SwitchRangeArray)
62
63
64 class ResolveNode;
65
66 define_array(NodeArray, ResolveNode*);
67 define_stack(NodeList, NodeArray);
68
69
70 // Node objects form a directed graph of LIR_Opr
71 // Edges between Nodes represent moves from one Node to its destinations
72 class ResolveNode: public CompilationResourceObj {
73 private:
74 LIR_Opr _operand; // the source or destinaton
75 NodeList _destinations; // for the operand
76 bool _assigned; // Value assigned to this Node?
77 bool _visited; // Node already visited?
78 bool _start_node; // Start node already visited?
79
80 public:
81 ResolveNode(LIR_Opr operand)
82 : _operand(operand)
83 , _assigned(false)
84 , _visited(false)
85 , _start_node(false) {};
86
87 // accessors
88 LIR_Opr operand() const { return _operand; }
89 int no_of_destinations() const { return _destinations.length(); }
90 ResolveNode* destination_at(int i) { return _destinations[i]; }
91 bool assigned() const { return _assigned; }
92 bool visited() const { return _visited; }
93 bool start_node() const { return _start_node; }
94
95 // modifiers
96 void append(ResolveNode* dest) { _destinations.append(dest); }
97 void set_assigned() { _assigned = true; }
98 void set_visited() { _visited = true; }
99 void set_start_node() { _start_node = true; }
100 };
101
102
103 // This is shared state to be used by the PhiResolver so the operand
104 // arrays don't have to be reallocated for reach resolution.
105 class PhiResolverState: public CompilationResourceObj {
106 friend class PhiResolver;
107
108 private:
109 NodeList _virtual_operands; // Nodes where the operand is a virtual register
110 NodeList _other_operands; // Nodes where the operand is not a virtual register
111 NodeList _vreg_table; // Mapping from virtual register to Node
112
113 public:
114 PhiResolverState() {}
115
116 void reset(int max_vregs);
117 };
118
119
120 // class used to move value of phi operand to phi function
121 class PhiResolver: public CompilationResourceObj {
122 private:
123 LIRGenerator* _gen;
124 PhiResolverState& _state; // temporary state cached by LIRGenerator
125
126 ResolveNode* _loop;
127 LIR_Opr _temp;
128
129 // access to shared state arrays
130 NodeList& virtual_operands() { return _state._virtual_operands; }
131 NodeList& other_operands() { return _state._other_operands; }
132 NodeList& vreg_table() { return _state._vreg_table; }
133
134 ResolveNode* create_node(LIR_Opr opr, bool source);
135 ResolveNode* source_node(LIR_Opr opr) { return create_node(opr, true); }
136 ResolveNode* destination_node(LIR_Opr opr) { return create_node(opr, false); }
137
138 void emit_move(LIR_Opr src, LIR_Opr dest);
139 void move_to_temp(LIR_Opr src);
140 void move_temp_to(LIR_Opr dest);
141 void move(ResolveNode* src, ResolveNode* dest);
142
143 LIRGenerator* gen() {
144 return _gen;
145 }
146
147 public:
148 PhiResolver(LIRGenerator* _lir_gen, int max_vregs);
149 ~PhiResolver();
150
151 void move(LIR_Opr src, LIR_Opr dest);
152 };
153
154
155 // only the classes below belong in the same file
156 class LIRGenerator: public InstructionVisitor, public BlockClosure {
157 friend class ShenandoahBarrierSetC1;
158 private:
159 Compilation* _compilation;
160 ciMethod* _method; // method that we are compiling
161 PhiResolverState _resolver_state;
162 BlockBegin* _block;
163 int _virtual_register_number;
164 Values _instruction_for_operand;
165 BitMap2D _vreg_flags; // flags which can be set on a per-vreg basis
166 LIR_List* _lir;
167 BarrierSet* _bs;
168
169 LIRGenerator* gen() {
170 return this;
171 }
172
173 void print_if_not_loaded(const NewInstance* new_instance) PRODUCT_RETURN;
174
175 #ifdef ASSERT
176 LIR_List* lir(const char * file, int line) const {
177 _lir->set_file_and_line(file, line);
178 return _lir;
179 }
180 #endif
181 LIR_List* lir() const {
182 return _lir;
183 }
184
185 // a simple cache of constants used within a block
186 GrowableArray<LIR_Const*> _constants;
187 LIR_OprList _reg_for_constants;
188 Values _unpinned_constants;
189
190 friend class PhiResolver;
191
192 // unified bailout support
193 void bailout(const char* msg) const { compilation()->bailout(msg); }
194 bool bailed_out() const { return compilation()->bailed_out(); }
195
196 void block_do_prolog(BlockBegin* block);
197 void block_do_epilog(BlockBegin* block);
198
199 // register allocation
200 LIR_Opr rlock(Value instr); // lock a free register
201 LIR_Opr rlock_result(Value instr);
202 LIR_Opr rlock_result(Value instr, BasicType type);
203 LIR_Opr rlock_byte(BasicType type);
204 LIR_Opr rlock_callee_saved(BasicType type);
205
206 // get a constant into a register and get track of what register was used
207 LIR_Opr load_constant(Constant* x);
208 LIR_Opr load_constant(LIR_Const* constant);
209
210 // Given an immediate value, return an operand usable in logical ops.
211 LIR_Opr load_immediate(int x, BasicType type);
212
213 void set_result(Value x, LIR_Opr opr) {
214 assert(opr->is_valid(), "must set to valid value");
215 assert(x->operand()->is_illegal(), "operand should never change");
216 assert(!opr->is_register() || opr->is_virtual(), "should never set result to a physical register");
217 x->set_operand(opr);
218 assert(opr == x->operand(), "must be");
219 if (opr->is_virtual()) {
220 _instruction_for_operand.at_put_grow(opr->vreg_number(), x, NULL);
221 }
222 }
223 void set_no_result(Value x) { assert(!x->has_uses(), "can't have use"); x->clear_operand(); }
224
225 friend class LIRItem;
226
227 LIR_Opr round_item(LIR_Opr opr);
228 LIR_Opr force_to_spill(LIR_Opr value, BasicType t);
229
230 PhiResolverState& resolver_state() { return _resolver_state; }
231
232 void move_to_phi(PhiResolver* resolver, Value cur_val, Value sux_val);
233 void move_to_phi(ValueStack* cur_state);
234
235 // code emission
236 void do_ArithmeticOp_Long (ArithmeticOp* x);
237 void do_ArithmeticOp_Int (ArithmeticOp* x);
238 void do_ArithmeticOp_FPU (ArithmeticOp* x);
239
240 // platform dependent
241 LIR_Opr getThreadPointer();
242
243 void do_RegisterFinalizer(Intrinsic* x);
244 void do_isInstance(Intrinsic* x);
245 void do_getClass(Intrinsic* x);
246 void do_currentThread(Intrinsic* x);
247 void do_MathIntrinsic(Intrinsic* x);
248 void do_ArrayCopy(Intrinsic* x);
249 void do_CompareAndSwap(Intrinsic* x, ValueType* type);
250 void do_NIOCheckIndex(Intrinsic* x);
251 void do_FPIntrinsics(Intrinsic* x);
252 void do_Reference_get(Intrinsic* x);
253 void do_update_CRC32(Intrinsic* x);
254
255 void do_UnsafePrefetch(UnsafePrefetch* x, bool is_store);
256
257 LIR_Opr call_runtime(BasicTypeArray* signature, LIRItemList* args, address entry, ValueType* result_type, CodeEmitInfo* info);
258 LIR_Opr call_runtime(BasicTypeArray* signature, LIR_OprList* args, address entry, ValueType* result_type, CodeEmitInfo* info);
259
260 // convenience functions
261 LIR_Opr call_runtime(Value arg1, address entry, ValueType* result_type, CodeEmitInfo* info);
262 LIR_Opr call_runtime(Value arg1, Value arg2, address entry, ValueType* result_type, CodeEmitInfo* info);
263
264 // GC Barriers
265
266 // generic interface
267
268 void pre_barrier(LIR_Opr addr_opr, LIR_Opr pre_val, bool do_load, bool patch, CodeEmitInfo* info);
269 void post_barrier(LIR_OprDesc* addr, LIR_OprDesc* new_val);
270
271 // specific implementations
272 // pre barriers
273
274 void G1SATBCardTableModRef_pre_barrier(LIR_Opr addr_opr, LIR_Opr pre_val,
275 bool do_load, bool patch, CodeEmitInfo* info);
276
277 // post barriers
278
279 void G1SATBCardTableModRef_post_barrier(LIR_OprDesc* addr, LIR_OprDesc* new_val);
280 void CardTableModRef_post_barrier(LIR_OprDesc* addr, LIR_OprDesc* new_val);
281 #ifdef CARDTABLEMODREF_POST_BARRIER_HELPER
282 void CardTableModRef_post_barrier_helper(LIR_OprDesc* addr, LIR_Const* card_table_base);
283 #endif
284
285
286 static LIR_Opr result_register_for(ValueType* type, bool callee = false);
287
288 ciObject* get_jobject_constant(Value value);
289
290 LIRItemList* invoke_visit_arguments(Invoke* x);
291 void invoke_load_arguments(Invoke* x, LIRItemList* args, const LIR_OprList* arg_list);
292
293 void trace_block_entry(BlockBegin* block);
294
295 // volatile field operations are never patchable because a klass
296 // must be loaded to know it's volatile which means that the offset
297 // it always known as well.
298 void volatile_field_store(LIR_Opr value, LIR_Address* address, CodeEmitInfo* info);
299 void volatile_field_load(LIR_Address* address, LIR_Opr result, CodeEmitInfo* info);
300
301 void put_Object_unsafe(LIR_Opr src, LIR_Opr offset, LIR_Opr data, BasicType type, bool is_volatile);
302 void get_Object_unsafe(LIR_Opr dest, LIR_Opr src, LIR_Opr offset, BasicType type, bool is_volatile);
303
304 void arithmetic_call_op (Bytecodes::Code code, LIR_Opr result, LIR_OprList* args);
305
306 void increment_counter(address counter, BasicType type, int step = 1);
307 void increment_counter(LIR_Address* addr, int step = 1);
308
309 // is_strictfp is only needed for mul and div (and only generates different code on i486)
310 void arithmetic_op(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, bool is_strictfp, LIR_Opr tmp, CodeEmitInfo* info = NULL);
311 // machine dependent. returns true if it emitted code for the multiply
312 bool strength_reduce_multiply(LIR_Opr left, jint constant, LIR_Opr result, LIR_Opr tmp);
313
314 void store_stack_parameter (LIR_Opr opr, ByteSize offset_from_sp_in_bytes);
315
316 void klass2reg_with_patching(LIR_Opr r, ciMetadata* obj, CodeEmitInfo* info, bool need_resolve = false);
317
318 // this loads the length and compares against the index
319 void array_range_check (LIR_Opr array, LIR_Opr index, CodeEmitInfo* null_check_info, CodeEmitInfo* range_check_info);
320 // For java.nio.Buffer.checkIndex
321 void nio_range_check (LIR_Opr buffer, LIR_Opr index, LIR_Opr result, CodeEmitInfo* info);
322
323 void arithmetic_op_int (Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, LIR_Opr tmp);
324 void arithmetic_op_long (Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, CodeEmitInfo* info = NULL);
325 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);
326
327 void shift_op (Bytecodes::Code code, LIR_Opr dst_reg, LIR_Opr value, LIR_Opr count, LIR_Opr tmp);
328
329 void logic_op (Bytecodes::Code code, LIR_Opr dst_reg, LIR_Opr left, LIR_Opr right);
330
331 void monitor_enter (LIR_Opr object, LIR_Opr lock, LIR_Opr hdr, LIR_Opr scratch, int monitor_no, CodeEmitInfo* info_for_exception, CodeEmitInfo* info);
332 void monitor_exit (LIR_Opr object, LIR_Opr lock, LIR_Opr hdr, LIR_Opr scratch, int monitor_no);
333
334 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);
335
336 // machine dependent
337 void cmp_mem_int(LIR_Condition condition, LIR_Opr base, int disp, int c, CodeEmitInfo* info);
338 void cmp_reg_mem(LIR_Condition condition, LIR_Opr reg, LIR_Opr base, int disp, BasicType type, CodeEmitInfo* info);
339 void cmp_reg_mem(LIR_Condition condition, LIR_Opr reg, LIR_Opr base, LIR_Opr disp, BasicType type, CodeEmitInfo* info);
340
341 void arraycopy_helper(Intrinsic* x, int* flags, ciArrayKlass** expected_type);
342
343 // returns a LIR_Address to address an array location. May also
344 // emit some code as part of address calculation. If
345 // needs_card_mark is true then compute the full address for use by
346 // both the store and the card mark.
347 LIR_Address* generate_address(LIR_Opr base,
348 LIR_Opr index, int shift,
349 int disp,
350 BasicType type);
351 LIR_Address* generate_address(LIR_Opr base, int disp, BasicType type) {
352 return generate_address(base, LIR_OprFact::illegalOpr, 0, disp, type);
353 }
354 LIR_Address* emit_array_address(LIR_Opr array_opr, LIR_Opr index_opr, BasicType type, bool needs_card_mark);
355
356 // the helper for generate_address
357 void add_large_constant(LIR_Opr src, int c, LIR_Opr dest);
358
359 // machine preferences and characteristics
360 bool can_inline_as_constant(Value i) const;
361 bool can_inline_as_constant(LIR_Const* c) const;
362 bool can_store_as_constant(Value i, BasicType type) const;
363
364 LIR_Opr safepoint_poll_register();
365
366 void profile_branch(If* if_instr, If::Condition cond);
367 void increment_event_counter_impl(CodeEmitInfo* info,
368 ciMethod *method, int frequency,
369 int bci, bool backedge, bool notify);
370 void increment_event_counter(CodeEmitInfo* info, int bci, bool backedge);
371 void increment_invocation_counter(CodeEmitInfo *info) {
372 if (compilation()->count_invocations()) {
373 increment_event_counter(info, InvocationEntryBci, false);
374 }
375 }
376 void increment_backedge_counter(CodeEmitInfo* info, int bci) {
377 if (compilation()->count_backedges()) {
378 increment_event_counter(info, bci, true);
379 }
380 }
381
382 CodeEmitInfo* state_for(Instruction* x, ValueStack* state, bool ignore_xhandler = false);
383 CodeEmitInfo* state_for(Instruction* x);
384
385 // allocates a virtual register for this instruction if
386 // one isn't already allocated. Only for Phi and Local.
387 LIR_Opr operand_for_instruction(Instruction *x);
388
389 void set_block(BlockBegin* block) { _block = block; }
390
391 void block_prolog(BlockBegin* block);
392 void block_epilog(BlockBegin* block);
393
394 void do_root (Instruction* instr);
395 void walk (Instruction* instr);
396
397 void bind_block_entry(BlockBegin* block);
398 void start_block(BlockBegin* block);
399
400 LIR_Opr new_register(BasicType type);
401 LIR_Opr new_register(Value value) { return new_register(as_BasicType(value->type())); }
402 LIR_Opr new_register(ValueType* type) { return new_register(as_BasicType(type)); }
403
404 // returns a register suitable for doing pointer math
405 LIR_Opr new_pointer_register() {
406 #ifdef _LP64
407 return new_register(T_LONG);
408 #else
409 return new_register(T_INT);
410 #endif
411 }
412
413 static LIR_Condition lir_cond(If::Condition cond) {
414 LIR_Condition l = lir_cond_unknown;
415 switch (cond) {
416 case If::eql: l = lir_cond_equal; break;
417 case If::neq: l = lir_cond_notEqual; break;
418 case If::lss: l = lir_cond_less; break;
419 case If::leq: l = lir_cond_lessEqual; break;
420 case If::geq: l = lir_cond_greaterEqual; break;
421 case If::gtr: l = lir_cond_greater; break;
422 case If::aeq: l = lir_cond_aboveEqual; break;
423 case If::beq: l = lir_cond_belowEqual; break;
424 default: fatal("You must pass valid If::Condition");
425 };
426 return l;
427 }
428
429 #ifdef __SOFTFP__
430 void do_soft_float_compare(If *x);
431 #endif // __SOFTFP__
432
433 void init();
434
435 SwitchRangeArray* create_lookup_ranges(TableSwitch* x);
436 SwitchRangeArray* create_lookup_ranges(LookupSwitch* x);
437 void do_SwitchRanges(SwitchRangeArray* x, LIR_Opr value, BlockBegin* default_sux);
438
439 void do_RuntimeCall(address routine, int expected_arguments, Intrinsic* x);
440 #ifdef JFR_HAVE_INTRINSICS
441 void do_ClassIDIntrinsic(Intrinsic* x);
442 void do_getEventWriter(Intrinsic* x);
443 #endif
444 ciKlass* profile_type(ciMethodData* md, int md_first_offset, int md_offset, intptr_t profiled_k,
445 Value arg, LIR_Opr& mdp, bool not_null, ciKlass* signature_at_call_k,
446 ciKlass* callee_signature_k);
447 void profile_arguments(ProfileCall* x);
448 void profile_parameters(Base* x);
449 void profile_parameters_at_call(ProfileCall* x);
450 LIR_Opr maybe_mask_boolean(StoreIndexed* x, LIR_Opr array, LIR_Opr value, CodeEmitInfo*& null_check_info);
451
452 public:
453 Compilation* compilation() const { return _compilation; }
454 FrameMap* frame_map() const { return _compilation->frame_map(); }
455 ciMethod* method() const { return _method; }
456 BlockBegin* block() const { return _block; }
457 IRScope* scope() const { return block()->scope(); }
458
459 int max_virtual_register_number() const { return _virtual_register_number; }
460
461 void block_do(BlockBegin* block);
462
463 // Flags that can be set on vregs
464 enum VregFlag {
465 must_start_in_memory = 0 // needs to be assigned a memory location at beginning, but may then be loaded in a register
466 , callee_saved = 1 // must be in a callee saved register
467 , byte_reg = 2 // must be in a byte register
468 , num_vreg_flags
469
470 };
471
472 LIRGenerator(Compilation* compilation, ciMethod* method)
473 : _compilation(compilation)
474 , _method(method)
475 , _virtual_register_number(LIR_OprDesc::vreg_base)
476 , _vreg_flags(NULL, 0, num_vreg_flags) {
477 init();
478 }
479
480 // for virtual registers, maps them back to Phi's or Local's
481 Instruction* instruction_for_opr(LIR_Opr opr);
482 Instruction* instruction_for_vreg(int reg_num);
483
484 void set_vreg_flag (int vreg_num, VregFlag f);
485 bool is_vreg_flag_set(int vreg_num, VregFlag f);
486 void set_vreg_flag (LIR_Opr opr, VregFlag f) { set_vreg_flag(opr->vreg_number(), f); }
487 bool is_vreg_flag_set(LIR_Opr opr, VregFlag f) { return is_vreg_flag_set(opr->vreg_number(), f); }
488
489 // statics
490 static LIR_Opr exceptionOopOpr();
491 static LIR_Opr exceptionPcOpr();
492 static LIR_Opr divInOpr();
493 static LIR_Opr divOutOpr();
494 static LIR_Opr remOutOpr();
495 static LIR_Opr shiftCountOpr();
496 LIR_Opr syncTempOpr();
497 LIR_Opr atomicLockOpr();
498
499 // returns a register suitable for saving the thread in a
500 // call_runtime_leaf if one is needed.
501 LIR_Opr getThreadTemp();
502
503 // visitor functionality
504 virtual void do_Phi (Phi* x);
505 virtual void do_Local (Local* x);
506 virtual void do_Constant (Constant* x);
507 virtual void do_LoadField (LoadField* x);
508 virtual void do_StoreField (StoreField* x);
509 virtual void do_ArrayLength (ArrayLength* x);
510 virtual void do_LoadIndexed (LoadIndexed* x);
511 virtual void do_StoreIndexed (StoreIndexed* x);
512 virtual void do_NegateOp (NegateOp* x);
513 virtual void do_ArithmeticOp (ArithmeticOp* x);
514 virtual void do_ShiftOp (ShiftOp* x);
515 virtual void do_LogicOp (LogicOp* x);
516 virtual void do_CompareOp (CompareOp* x);
517 virtual void do_IfOp (IfOp* x);
518 virtual void do_Convert (Convert* x);
519 virtual void do_NullCheck (NullCheck* x);
520 virtual void do_TypeCast (TypeCast* x);
521 virtual void do_Invoke (Invoke* x);
522 virtual void do_NewInstance (NewInstance* x);
523 virtual void do_NewTypeArray (NewTypeArray* x);
524 virtual void do_NewObjectArray (NewObjectArray* x);
525 virtual void do_NewMultiArray (NewMultiArray* x);
526 virtual void do_CheckCast (CheckCast* x);
527 virtual void do_InstanceOf (InstanceOf* x);
528 virtual void do_MonitorEnter (MonitorEnter* x);
529 virtual void do_MonitorExit (MonitorExit* x);
530 virtual void do_Intrinsic (Intrinsic* x);
531 virtual void do_BlockBegin (BlockBegin* x);
532 virtual void do_Goto (Goto* x);
533 virtual void do_If (If* x);
534 virtual void do_IfInstanceOf (IfInstanceOf* x);
535 virtual void do_TableSwitch (TableSwitch* x);
536 virtual void do_LookupSwitch (LookupSwitch* x);
537 virtual void do_Return (Return* x);
538 virtual void do_Throw (Throw* x);
539 virtual void do_Base (Base* x);
540 virtual void do_OsrEntry (OsrEntry* x);
541 virtual void do_ExceptionObject(ExceptionObject* x);
542 virtual void do_RoundFP (RoundFP* x);
543 virtual void do_UnsafeGetRaw (UnsafeGetRaw* x);
544 virtual void do_UnsafePutRaw (UnsafePutRaw* x);
545 virtual void do_UnsafeGetObject(UnsafeGetObject* x);
546 virtual void do_UnsafePutObject(UnsafePutObject* x);
547 virtual void do_UnsafeGetAndSetObject(UnsafeGetAndSetObject* x);
548 virtual void do_UnsafePrefetchRead (UnsafePrefetchRead* x);
549 virtual void do_UnsafePrefetchWrite(UnsafePrefetchWrite* x);
550 virtual void do_ProfileCall (ProfileCall* x);
551 virtual void do_ProfileReturnType (ProfileReturnType* x);
552 virtual void do_ProfileInvoke (ProfileInvoke* x);
553 virtual void do_RuntimeCall (RuntimeCall* x);
554 virtual void do_MemBar (MemBar* x);
555 virtual void do_RangeCheckPredicate(RangeCheckPredicate* x);
556 #ifdef ASSERT
557 virtual void do_Assert (Assert* x);
558 #endif
559
560 #ifdef C1_LIRGENERATOR_MD_HPP
561 #include C1_LIRGENERATOR_MD_HPP
562 #endif
563 };
564
565
566 class LIRItem: public CompilationResourceObj {
567 private:
568 Value _value;
569 LIRGenerator* _gen;
570 LIR_Opr _result;
571 bool _destroys_register;
572 LIR_Opr _new_result;
573
574 LIRGenerator* gen() const { return _gen; }
575
576 public:
577 LIRItem(Value value, LIRGenerator* gen) {
578 _destroys_register = false;
579 _gen = gen;
580 set_instruction(value);
581 }
582
583 LIRItem(LIRGenerator* gen) {
584 _destroys_register = false;
585 _gen = gen;
586 _result = LIR_OprFact::illegalOpr;
587 set_instruction(NULL);
588 }
589
590 void set_instruction(Value value) {
591 _value = value;
592 _result = LIR_OprFact::illegalOpr;
593 if (_value != NULL) {
594 _gen->walk(_value);
595 _result = _value->operand();
596 }
597 _new_result = LIR_OprFact::illegalOpr;
598 }
599
600 Value value() const { return _value; }
601 ValueType* type() const { return value()->type(); }
602 LIR_Opr result() {
603 assert(!_destroys_register || (!_result->is_register() || _result->is_virtual()),
604 "shouldn't use set_destroys_register with physical regsiters");
605 if (_destroys_register && _result->is_register()) {
606 if (_new_result->is_illegal()) {
607 _new_result = _gen->new_register(type());
608 gen()->lir()->move(_result, _new_result);
609 }
610 return _new_result;
611 } else {
612 return _result;
613 }
614 return _result;
615 }
616
617 void set_result(LIR_Opr opr);
618
619 void load_item();
620 void load_byte_item();
621 void load_nonconstant();
622 // load any values which can't be expressed as part of a single store instruction
623 void load_for_store(BasicType store_type);
624 void load_item_force(LIR_Opr reg);
625
626 void dont_load_item() {
627 // do nothing
628 }
629
630 void set_destroys_register() {
631 _destroys_register = true;
632 }
633
634 bool is_constant() const { return value()->as_Constant() != NULL; }
635 bool is_stack() { return result()->is_stack(); }
636 bool is_register() { return result()->is_register(); }
637
638 ciObject* get_jobject_constant() const;
639 jint get_jint_constant() const;
640 jlong get_jlong_constant() const;
641 jfloat get_jfloat_constant() const;
642 jdouble get_jdouble_constant() const;
643 jint get_address_constant() const;
644 };
645
646 #endif // SHARE_VM_C1_C1_LIRGENERATOR_HPP