1 /*
2 * Copyright (c) 2005, 2018, 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 "utilities/macros.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 typedef GrowableArray<LIRItem*> LIRItemList;
44
45 class SwitchRange: public CompilationResourceObj {
46 private:
47 int _low_key;
48 int _high_key;
49 BlockBegin* _sux;
50 public:
51 SwitchRange(int start_key, BlockBegin* sux): _low_key(start_key), _high_key(start_key), _sux(sux) {}
52 void set_high_key(int key) { _high_key = key; }
53
54 int high_key() const { return _high_key; }
55 int low_key() const { return _low_key; }
56 BlockBegin* sux() const { return _sux; }
57 };
58
59 typedef GrowableArray<SwitchRange*> SwitchRangeArray;
60 typedef GrowableArray<SwitchRange*> SwitchRangeList;
61
62 class ResolveNode;
63
64 typedef GrowableArray<ResolveNode*> NodeList;
65
66 // Node objects form a directed graph of LIR_Opr
67 // Edges between Nodes represent moves from one Node to its destinations
68 class ResolveNode: public CompilationResourceObj {
69 private:
70 LIR_Opr _operand; // the source or destinaton
71 NodeList _destinations; // for the operand
72 bool _assigned; // Value assigned to this Node?
73 bool _visited; // Node already visited?
74 bool _start_node; // Start node already visited?
75
76 public:
77 ResolveNode(LIR_Opr operand)
78 : _operand(operand)
79 , _assigned(false)
80 , _visited(false)
81 , _start_node(false) {};
82
83 // accessors
84 LIR_Opr operand() const { return _operand; }
85 int no_of_destinations() const { return _destinations.length(); }
86 ResolveNode* destination_at(int i) { return _destinations.at(i); }
87 bool assigned() const { return _assigned; }
88 bool visited() const { return _visited; }
89 bool start_node() const { return _start_node; }
90
91 // modifiers
92 void append(ResolveNode* dest) { _destinations.append(dest); }
93 void set_assigned() { _assigned = true; }
94 void set_visited() { _visited = true; }
95 void set_start_node() { _start_node = true; }
96 };
97
98
99 // This is shared state to be used by the PhiResolver so the operand
100 // arrays don't have to be reallocated for reach resolution.
101 class PhiResolverState: public CompilationResourceObj {
102 friend class PhiResolver;
103
104 private:
105 NodeList _virtual_operands; // Nodes where the operand is a virtual register
106 NodeList _other_operands; // Nodes where the operand is not a virtual register
107 NodeList _vreg_table; // Mapping from virtual register to Node
108
109 public:
110 PhiResolverState() {}
111
112 void reset(int max_vregs);
113 };
114
115
116 // class used to move value of phi operand to phi function
117 class PhiResolver: public CompilationResourceObj {
118 private:
119 LIRGenerator* _gen;
120 PhiResolverState& _state; // temporary state cached by LIRGenerator
121
122 ResolveNode* _loop;
123 LIR_Opr _temp;
124
125 // access to shared state arrays
126 NodeList& virtual_operands() { return _state._virtual_operands; }
127 NodeList& other_operands() { return _state._other_operands; }
128 NodeList& vreg_table() { return _state._vreg_table; }
129
130 ResolveNode* create_node(LIR_Opr opr, bool source);
131 ResolveNode* source_node(LIR_Opr opr) { return create_node(opr, true); }
132 ResolveNode* destination_node(LIR_Opr opr) { return create_node(opr, false); }
133
134 void emit_move(LIR_Opr src, LIR_Opr dest);
135 void move_to_temp(LIR_Opr src);
136 void move_temp_to(LIR_Opr dest);
137 void move(ResolveNode* src, ResolveNode* dest);
138
139 LIRGenerator* gen() {
140 return _gen;
141 }
142
143 public:
144 PhiResolver(LIRGenerator* _lir_gen, int max_vregs);
145 ~PhiResolver();
146
147 void move(LIR_Opr src, LIR_Opr dest);
148 };
149
150
151 // only the classes below belong in the same file
152 class LIRGenerator: public InstructionVisitor, public BlockClosure {
153 // LIRGenerator should never get instatiated on the heap.
154 private:
155 void* operator new(size_t size) throw();
156 void* operator new[](size_t size) throw();
157 void operator delete(void* p) { ShouldNotReachHere(); }
158 void operator delete[](void* p) { ShouldNotReachHere(); }
159
160 Compilation* _compilation;
161 ciMethod* _method; // method that we are compiling
162 PhiResolverState _resolver_state;
163 BlockBegin* _block;
164 int _virtual_register_number;
165 Values _instruction_for_operand;
166 BitMap2D _vreg_flags; // flags which can be set on a per-vreg basis
167 LIR_List* _lir;
168 BarrierSet* _bs;
169
170 LIRGenerator* gen() {
171 return this;
172 }
173
174 void print_if_not_loaded(const NewInstance* new_instance) PRODUCT_RETURN;
175
176 #ifdef ASSERT
177 LIR_List* lir(const char * file, int line) const {
178 _lir->set_file_and_line(file, line);
179 return _lir;
180 }
181 #endif
182 LIR_List* lir() const {
183 return _lir;
184 }
185
186 // a simple cache of constants used within a block
187 GrowableArray<LIR_Const*> _constants;
188 LIR_OprList _reg_for_constants;
189 Values _unpinned_constants;
190
191 friend class PhiResolver;
192
193 // unified bailout support
194 void bailout(const char* msg) const { compilation()->bailout(msg); }
195 bool bailed_out() const { return compilation()->bailed_out(); }
196
197 void block_do_prolog(BlockBegin* block);
198 void block_do_epilog(BlockBegin* block);
199
200 // register allocation
201 LIR_Opr rlock(Value instr); // lock a free register
202 LIR_Opr rlock_result(Value instr);
203 LIR_Opr rlock_result(Value instr, BasicType type);
204 LIR_Opr rlock_byte(BasicType type);
205 LIR_Opr rlock_callee_saved(BasicType type);
206
207 // get a constant into a register and get track of what register was used
208 LIR_Opr load_constant(Constant* x);
209 LIR_Opr load_constant(LIR_Const* constant);
210
211 // Given an immediate value, return an operand usable in logical ops.
212 LIR_Opr load_immediate(int x, BasicType type);
213
214 void set_result(Value x, LIR_Opr opr) {
215 assert(opr->is_valid(), "must set to valid value");
216 assert(x->operand()->is_illegal(), "operand should never change");
217 assert(!opr->is_register() || opr->is_virtual(), "should never set result to a physical register");
218 x->set_operand(opr);
219 assert(opr == x->operand(), "must be");
220 if (opr->is_virtual()) {
221 _instruction_for_operand.at_put_grow(opr->vreg_number(), x, NULL);
222 }
223 }
224 void set_no_result(Value x) { assert(!x->has_uses(), "can't have use"); x->clear_operand(); }
225
226 friend class LIRItem;
227
228 LIR_Opr round_item(LIR_Opr opr);
229 LIR_Opr force_to_spill(LIR_Opr value, BasicType t);
230
231 PhiResolverState& resolver_state() { return _resolver_state; }
232
233 void move_to_phi(PhiResolver* resolver, Value cur_val, Value sux_val);
234 void move_to_phi(ValueStack* cur_state);
235
236 // code emission
237 void do_ArithmeticOp_Long (ArithmeticOp* x);
238 void do_ArithmeticOp_Int (ArithmeticOp* x);
239 void do_ArithmeticOp_FPU (ArithmeticOp* x);
240
241 // platform dependent
242 LIR_Opr getThreadPointer();
243
244 void do_RegisterFinalizer(Intrinsic* x);
245 void do_isInstance(Intrinsic* x);
246 void do_isPrimitive(Intrinsic* x);
247 void do_getClass(Intrinsic* x);
248 void do_currentThread(Intrinsic* x);
249 void do_FmaIntrinsic(Intrinsic* x);
250 void do_MathIntrinsic(Intrinsic* x);
251 void do_LibmIntrinsic(Intrinsic* x);
252 void do_ArrayCopy(Intrinsic* x);
253 void do_CompareAndSwap(Intrinsic* x, ValueType* type);
254 void do_NIOCheckIndex(Intrinsic* x);
255 void do_FPIntrinsics(Intrinsic* x);
256 void do_Reference_get(Intrinsic* x);
257 void do_update_CRC32(Intrinsic* x);
258 void do_update_CRC32C(Intrinsic* x);
259 void do_vectorizedMismatch(Intrinsic* x);
260
261 LIR_Opr call_runtime(BasicTypeArray* signature, LIRItemList* args, address entry, ValueType* result_type, CodeEmitInfo* info);
262 LIR_Opr call_runtime(BasicTypeArray* signature, LIR_OprList* args, address entry, ValueType* result_type, CodeEmitInfo* info);
263
264 // convenience functions
265 LIR_Opr call_runtime(Value arg1, address entry, ValueType* result_type, CodeEmitInfo* info);
266 LIR_Opr call_runtime(Value arg1, Value arg2, address entry, ValueType* result_type, CodeEmitInfo* info);
267
268 // GC Barriers
269
270 // generic interface
271
272 void pre_barrier(LIR_Opr addr_opr, LIR_Opr pre_val, bool do_load, bool patch, CodeEmitInfo* info);
273 void post_barrier(LIR_OprDesc* addr, LIR_OprDesc* new_val);
274
275 // specific implementations
276 // pre barriers
277
278 void G1BarrierSet_pre_barrier(LIR_Opr addr_opr, LIR_Opr pre_val,
279 bool do_load, bool patch, CodeEmitInfo* info);
280
281 // post barriers
282
283 void G1BarrierSet_post_barrier(LIR_OprDesc* addr, LIR_OprDesc* new_val);
284 void CardTableBarrierSet_post_barrier(LIR_OprDesc* addr, LIR_OprDesc* new_val);
285 #ifdef CARDTABLEBARRIERSET_POST_BARRIER_HELPER
286 void CardTableBarrierSet_post_barrier_helper(LIR_OprDesc* addr, LIR_Const* card_table_base);
287 #endif
288
289
290 static LIR_Opr result_register_for(ValueType* type, bool callee = false);
291
292 ciObject* get_jobject_constant(Value value);
293
294 LIRItemList* invoke_visit_arguments(Invoke* x);
295 void invoke_load_arguments(Invoke* x, LIRItemList* args, const LIR_OprList* arg_list);
296
297 void trace_block_entry(BlockBegin* block);
298
299 // volatile field operations are never patchable because a klass
300 // must be loaded to know it's volatile which means that the offset
301 // it always known as well.
302 void volatile_field_store(LIR_Opr value, LIR_Address* address, CodeEmitInfo* info);
303 void volatile_field_load(LIR_Address* address, LIR_Opr result, CodeEmitInfo* info);
304
305 void put_Object_unsafe(LIR_Opr src, LIR_Opr offset, LIR_Opr data, BasicType type, bool is_volatile);
306 void get_Object_unsafe(LIR_Opr dest, LIR_Opr src, LIR_Opr offset, BasicType type, bool is_volatile);
307
308 void arithmetic_call_op (Bytecodes::Code code, LIR_Opr result, LIR_OprList* args);
309
310 void increment_counter(address counter, BasicType type, int step = 1);
311 void increment_counter(LIR_Address* addr, int step = 1);
312
313 // is_strictfp is only needed for mul and div (and only generates different code on i486)
314 void arithmetic_op(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, bool is_strictfp, LIR_Opr tmp, CodeEmitInfo* info = NULL);
315 // machine dependent. returns true if it emitted code for the multiply
316 bool strength_reduce_multiply(LIR_Opr left, jint constant, LIR_Opr result, LIR_Opr tmp);
317
318 void store_stack_parameter (LIR_Opr opr, ByteSize offset_from_sp_in_bytes);
319
320 void klass2reg_with_patching(LIR_Opr r, ciMetadata* obj, CodeEmitInfo* info, bool need_resolve = false);
321
322 // this loads the length and compares against the index
323 void array_range_check (LIR_Opr array, LIR_Opr index, CodeEmitInfo* null_check_info, CodeEmitInfo* range_check_info);
324 // For java.nio.Buffer.checkIndex
325 void nio_range_check (LIR_Opr buffer, LIR_Opr index, LIR_Opr result, CodeEmitInfo* info);
326
327 void arithmetic_op_int (Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, LIR_Opr tmp);
328 void arithmetic_op_long (Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, CodeEmitInfo* info = NULL);
329 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);
330
331 void shift_op (Bytecodes::Code code, LIR_Opr dst_reg, LIR_Opr value, LIR_Opr count, LIR_Opr tmp);
332
333 void logic_op (Bytecodes::Code code, LIR_Opr dst_reg, LIR_Opr left, LIR_Opr right);
334
335 void monitor_enter (LIR_Opr object, LIR_Opr lock, LIR_Opr hdr, LIR_Opr scratch, int monitor_no, CodeEmitInfo* info_for_exception, CodeEmitInfo* info);
336 void monitor_exit (LIR_Opr object, LIR_Opr lock, LIR_Opr hdr, LIR_Opr scratch, int monitor_no);
337
338 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);
339
340 // machine dependent
341 void cmp_mem_int(LIR_Condition condition, LIR_Opr base, int disp, int c, CodeEmitInfo* info);
342 void cmp_reg_mem(LIR_Condition condition, LIR_Opr reg, LIR_Opr base, int disp, BasicType type, CodeEmitInfo* info);
343
344 void arraycopy_helper(Intrinsic* x, int* flags, ciArrayKlass** expected_type);
345
346 // returns a LIR_Address to address an array location. May also
347 // emit some code as part of address calculation. If
348 // needs_card_mark is true then compute the full address for use by
349 // both the store and the card mark.
350 LIR_Address* generate_address(LIR_Opr base,
351 LIR_Opr index, int shift,
352 int disp,
353 BasicType type);
354 LIR_Address* generate_address(LIR_Opr base, int disp, BasicType type) {
355 return generate_address(base, LIR_OprFact::illegalOpr, 0, disp, type);
356 }
357 LIR_Address* emit_array_address(LIR_Opr array_opr, LIR_Opr index_opr, BasicType type, bool needs_card_mark);
358
359 // the helper for generate_address
360 void add_large_constant(LIR_Opr src, int c, LIR_Opr dest);
361
362 // machine preferences and characteristics
363 bool can_inline_as_constant(Value i S390_ONLY(COMMA int bits = 20)) const;
364 bool can_inline_as_constant(LIR_Const* c) const;
365 bool can_store_as_constant(Value i, BasicType type) const;
366
367 LIR_Opr safepoint_poll_register();
368
369 void profile_branch(If* if_instr, If::Condition cond);
370 void increment_event_counter_impl(CodeEmitInfo* info,
371 ciMethod *method, int frequency,
372 int bci, bool backedge, bool notify);
373 void increment_event_counter(CodeEmitInfo* info, int bci, bool backedge);
374 void increment_invocation_counter(CodeEmitInfo *info) {
375 if (compilation()->count_invocations()) {
376 increment_event_counter(info, InvocationEntryBci, false);
377 }
378 }
379 void increment_backedge_counter(CodeEmitInfo* info, int bci) {
380 if (compilation()->count_backedges()) {
381 increment_event_counter(info, bci, true);
382 }
383 }
384 void decrement_age(CodeEmitInfo* info);
385 CodeEmitInfo* state_for(Instruction* x, ValueStack* state, bool ignore_xhandler = false);
386 CodeEmitInfo* state_for(Instruction* x);
387
388 // allocates a virtual register for this instruction if
389 // one isn't already allocated. Only for Phi and Local.
390 LIR_Opr operand_for_instruction(Instruction *x);
391
392 void set_block(BlockBegin* block) { _block = block; }
393
394 void block_prolog(BlockBegin* block);
395 void block_epilog(BlockBegin* block);
396
397 void do_root (Instruction* instr);
398 void walk (Instruction* instr);
399
400 void bind_block_entry(BlockBegin* block);
401 void start_block(BlockBegin* block);
402
403 LIR_Opr new_register(BasicType type);
404 LIR_Opr new_register(Value value) { return new_register(as_BasicType(value->type())); }
405 LIR_Opr new_register(ValueType* type) { return new_register(as_BasicType(type)); }
406
407 // returns a register suitable for doing pointer math
408 LIR_Opr new_pointer_register() {
409 #ifdef _LP64
410 return new_register(T_LONG);
411 #else
412 return new_register(T_INT);
413 #endif
414 }
415
416 static LIR_Condition lir_cond(If::Condition cond) {
417 LIR_Condition l = lir_cond_unknown;
418 switch (cond) {
419 case If::eql: l = lir_cond_equal; break;
420 case If::neq: l = lir_cond_notEqual; break;
421 case If::lss: l = lir_cond_less; break;
422 case If::leq: l = lir_cond_lessEqual; break;
423 case If::geq: l = lir_cond_greaterEqual; break;
424 case If::gtr: l = lir_cond_greater; break;
425 case If::aeq: l = lir_cond_aboveEqual; break;
426 case If::beq: l = lir_cond_belowEqual; break;
427 default: fatal("You must pass valid If::Condition");
428 };
429 return l;
430 }
431
432 #ifdef __SOFTFP__
433 void do_soft_float_compare(If *x);
434 #endif // __SOFTFP__
435
436 void init();
437
438 SwitchRangeArray* create_lookup_ranges(TableSwitch* x);
439 SwitchRangeArray* create_lookup_ranges(LookupSwitch* x);
440 void do_SwitchRanges(SwitchRangeArray* x, LIR_Opr value, BlockBegin* default_sux);
441
442 #ifdef TRACE_HAVE_INTRINSICS
443 void do_ClassIDIntrinsic(Intrinsic* x);
444 void do_getBufferWriter(Intrinsic* x);
445 #endif
446
447 void do_RuntimeCall(address routine, Intrinsic* x);
448
449 ciKlass* profile_type(ciMethodData* md, int md_first_offset, int md_offset, intptr_t profiled_k,
450 Value arg, LIR_Opr& mdp, bool not_null, ciKlass* signature_at_call_k,
451 ciKlass* callee_signature_k);
452 void profile_arguments(ProfileCall* x);
453 void profile_parameters(Base* x);
454 void profile_parameters_at_call(ProfileCall* x);
455 LIR_Opr maybe_mask_boolean(StoreIndexed* x, LIR_Opr array, LIR_Opr value, CodeEmitInfo*& null_check_info);
456
457 public:
458 Compilation* compilation() const { return _compilation; }
459 FrameMap* frame_map() const { return _compilation->frame_map(); }
460 ciMethod* method() const { return _method; }
461 BlockBegin* block() const { return _block; }
462 IRScope* scope() const { return block()->scope(); }
463
464 int max_virtual_register_number() const { return _virtual_register_number; }
465
466 void block_do(BlockBegin* block);
467
468 // Flags that can be set on vregs
469 enum VregFlag {
470 must_start_in_memory = 0 // needs to be assigned a memory location at beginning, but may then be loaded in a register
471 , callee_saved = 1 // must be in a callee saved register
472 , byte_reg = 2 // must be in a byte register
473 , num_vreg_flags
474
475 };
476
477 LIRGenerator(Compilation* compilation, ciMethod* method)
478 : _compilation(compilation)
479 , _method(method)
480 , _virtual_register_number(LIR_OprDesc::vreg_base)
481 , _vreg_flags(num_vreg_flags) {
482 init();
483 }
484
485 // for virtual registers, maps them back to Phi's or Local's
486 Instruction* instruction_for_opr(LIR_Opr opr);
487 Instruction* instruction_for_vreg(int reg_num);
488
489 void set_vreg_flag (int vreg_num, VregFlag f);
490 bool is_vreg_flag_set(int vreg_num, VregFlag f);
491 void set_vreg_flag (LIR_Opr opr, VregFlag f) { set_vreg_flag(opr->vreg_number(), f); }
492 bool is_vreg_flag_set(LIR_Opr opr, VregFlag f) { return is_vreg_flag_set(opr->vreg_number(), f); }
493
494 // statics
495 static LIR_Opr exceptionOopOpr();
496 static LIR_Opr exceptionPcOpr();
497 static LIR_Opr divInOpr();
498 static LIR_Opr divOutOpr();
499 static LIR_Opr remOutOpr();
500 #ifdef S390
501 // On S390 we can do ldiv, lrem without RT call.
502 static LIR_Opr ldivInOpr();
503 static LIR_Opr ldivOutOpr();
504 static LIR_Opr lremOutOpr();
505 #endif
506 static LIR_Opr shiftCountOpr();
507 LIR_Opr syncLockOpr();
508 LIR_Opr syncTempOpr();
509 LIR_Opr atomicLockOpr();
510
511 // returns a register suitable for saving the thread in a
512 // call_runtime_leaf if one is needed.
513 LIR_Opr getThreadTemp();
514
515 // visitor functionality
516 virtual void do_Phi (Phi* x);
517 virtual void do_Local (Local* x);
518 virtual void do_Constant (Constant* x);
519 virtual void do_LoadField (LoadField* x);
520 virtual void do_StoreField (StoreField* x);
521 virtual void do_ArrayLength (ArrayLength* x);
522 virtual void do_LoadIndexed (LoadIndexed* x);
523 virtual void do_StoreIndexed (StoreIndexed* x);
524 virtual void do_NegateOp (NegateOp* x);
525 virtual void do_ArithmeticOp (ArithmeticOp* x);
526 virtual void do_ShiftOp (ShiftOp* x);
527 virtual void do_LogicOp (LogicOp* x);
528 virtual void do_CompareOp (CompareOp* x);
529 virtual void do_IfOp (IfOp* x);
530 virtual void do_Convert (Convert* x);
531 virtual void do_NullCheck (NullCheck* x);
532 virtual void do_TypeCast (TypeCast* x);
533 virtual void do_Invoke (Invoke* x);
534 virtual void do_NewInstance (NewInstance* x);
535 virtual void do_NewTypeArray (NewTypeArray* x);
536 virtual void do_NewObjectArray (NewObjectArray* x);
537 virtual void do_NewMultiArray (NewMultiArray* x);
538 virtual void do_CheckCast (CheckCast* x);
539 virtual void do_InstanceOf (InstanceOf* x);
540 virtual void do_MonitorEnter (MonitorEnter* x);
541 virtual void do_MonitorExit (MonitorExit* x);
542 virtual void do_Intrinsic (Intrinsic* x);
543 virtual void do_BlockBegin (BlockBegin* x);
544 virtual void do_Goto (Goto* x);
545 virtual void do_If (If* x);
546 virtual void do_IfInstanceOf (IfInstanceOf* x);
547 virtual void do_TableSwitch (TableSwitch* x);
548 virtual void do_LookupSwitch (LookupSwitch* x);
549 virtual void do_Return (Return* x);
550 virtual void do_Throw (Throw* x);
551 virtual void do_Base (Base* x);
552 virtual void do_OsrEntry (OsrEntry* x);
553 virtual void do_ExceptionObject(ExceptionObject* x);
554 virtual void do_RoundFP (RoundFP* x);
555 virtual void do_UnsafeGetRaw (UnsafeGetRaw* x);
556 virtual void do_UnsafePutRaw (UnsafePutRaw* x);
557 virtual void do_UnsafeGetObject(UnsafeGetObject* x);
558 virtual void do_UnsafePutObject(UnsafePutObject* x);
559 virtual void do_UnsafeGetAndSetObject(UnsafeGetAndSetObject* x);
560 virtual void do_ProfileCall (ProfileCall* x);
561 virtual void do_ProfileReturnType (ProfileReturnType* x);
562 virtual void do_ProfileInvoke (ProfileInvoke* x);
563 virtual void do_RuntimeCall (RuntimeCall* x);
564 virtual void do_MemBar (MemBar* x);
565 virtual void do_RangeCheckPredicate(RangeCheckPredicate* x);
566 #ifdef ASSERT
567 virtual void do_Assert (Assert* x);
568 #endif
569
570 #ifdef C1_LIRGENERATOR_MD_HPP
571 #include C1_LIRGENERATOR_MD_HPP
572 #endif
573 };
574
575
576 class LIRItem: public CompilationResourceObj {
577 private:
578 Value _value;
579 LIRGenerator* _gen;
580 LIR_Opr _result;
581 bool _destroys_register;
582 LIR_Opr _new_result;
583
584 LIRGenerator* gen() const { return _gen; }
585
586 public:
587 LIRItem(Value value, LIRGenerator* gen) {
588 _destroys_register = false;
589 _gen = gen;
590 set_instruction(value);
591 }
592
593 LIRItem(LIRGenerator* gen) {
594 _destroys_register = false;
595 _gen = gen;
596 _result = LIR_OprFact::illegalOpr;
597 set_instruction(NULL);
598 }
599
600 void set_instruction(Value value) {
601 _value = value;
602 _result = LIR_OprFact::illegalOpr;
603 if (_value != NULL) {
604 _gen->walk(_value);
605 _result = _value->operand();
606 }
607 _new_result = LIR_OprFact::illegalOpr;
608 }
609
610 Value value() const { return _value; }
611 ValueType* type() const { return value()->type(); }
612 LIR_Opr result() {
613 assert(!_destroys_register || (!_result->is_register() || _result->is_virtual()),
614 "shouldn't use set_destroys_register with physical regsiters");
615 if (_destroys_register && _result->is_register()) {
616 if (_new_result->is_illegal()) {
617 _new_result = _gen->new_register(type());
618 gen()->lir()->move(_result, _new_result);
619 }
620 return _new_result;
621 } else {
622 return _result;
623 }
624 return _result;
625 }
626
627 void set_result(LIR_Opr opr);
628
629 void load_item();
630 void load_byte_item();
631 void load_nonconstant(S390_ONLY(int bits = 20));
632 // load any values which can't be expressed as part of a single store instruction
633 void load_for_store(BasicType store_type);
634 void load_item_force(LIR_Opr reg);
635
636 void dont_load_item() {
637 // do nothing
638 }
639
640 void set_destroys_register() {
641 _destroys_register = true;
642 }
643
644 bool is_constant() const { return value()->as_Constant() != NULL; }
645 bool is_stack() { return result()->is_stack(); }
646 bool is_register() { return result()->is_register(); }
647
648 ciObject* get_jobject_constant() const;
649 jint get_jint_constant() const;
650 jlong get_jlong_constant() const;
651 jfloat get_jfloat_constant() const;
652 jdouble get_jdouble_constant() const;
653 jint get_address_constant() const;
654 };
655
656 #endif // SHARE_VM_C1_C1_LIRGENERATOR_HPP