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src/hotspot/share/c1/c1_LIRGenerator.hpp

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152 };
153 
154 
155 // only the classes below belong in the same file
156 class LIRGenerator: public InstructionVisitor, public BlockClosure {
157  // LIRGenerator should never get instatiated on the heap.
158  private:
159   void* operator new(size_t size) throw();
160   void* operator new[](size_t size) throw();
161   void operator delete(void* p) { ShouldNotReachHere(); }
162   void operator delete[](void* p) { ShouldNotReachHere(); }
163 
164   Compilation*  _compilation;
165   ciMethod*     _method;    // method that we are compiling
166   PhiResolverState  _resolver_state;
167   BlockBegin*   _block;
168   int           _virtual_register_number;
169   Values        _instruction_for_operand;
170   BitMap2D      _vreg_flags; // flags which can be set on a per-vreg basis
171   LIR_List*     _lir;

172 
173   LIRGenerator* gen() {
174     return this;
175   }
176 
177   void print_if_not_loaded(const NewInstance* new_instance) PRODUCT_RETURN;
178 
179  public:
180 #ifdef ASSERT
181   LIR_List* lir(const char * file, int line) const {
182     _lir->set_file_and_line(file, line);
183     return _lir;
184   }
185 #endif
186   LIR_List* lir() const {
187     return _lir;
188   }
189 
190  private:
191   // a simple cache of constants used within a block
192   GrowableArray<LIR_Const*>       _constants;
193   LIR_OprList                     _reg_for_constants;
194   Values                          _unpinned_constants;
195 
196   friend class PhiResolver;
197 

198  public:
199   // unified bailout support
200   void bailout(const char* msg) const            { compilation()->bailout(msg); }
201   bool bailed_out() const                        { return compilation()->bailed_out(); }
202 
203   void block_do_prolog(BlockBegin* block);
204   void block_do_epilog(BlockBegin* block);
205 
206   // register allocation
207   LIR_Opr rlock(Value instr);                      // lock a free register
208   LIR_Opr rlock_result(Value instr);
209   LIR_Opr rlock_result(Value instr, BasicType type);
210   LIR_Opr rlock_byte(BasicType type);
211   LIR_Opr rlock_callee_saved(BasicType type);
212 
213   // get a constant into a register and get track of what register was used
214   LIR_Opr load_constant(Constant* x);
215   LIR_Opr load_constant(LIR_Const* constant);
216 

217   // Given an immediate value, return an operand usable in logical ops.
218   LIR_Opr load_immediate(jlong x, BasicType type);
219 
220   void  set_result(Value x, LIR_Opr opr)           {
221     assert(opr->is_valid(), "must set to valid value");
222     assert(x->operand()->is_illegal(), "operand should never change");
223     assert(!opr->is_register() || opr->is_virtual(), "should never set result to a physical register");
224     x->set_operand(opr);
225     assert(opr == x->operand(), "must be");
226     if (opr->is_virtual()) {
227       _instruction_for_operand.at_put_grow(opr->vreg_number(), x, NULL);
228     }
229   }
230   void  set_no_result(Value x)                     { assert(!x->has_uses(), "can't have use"); x->clear_operand(); }
231 
232   friend class LIRItem;
233 
234   LIR_Opr round_item(LIR_Opr opr);
235   LIR_Opr force_to_spill(LIR_Opr value, BasicType t);
236 

256   void do_getModifiers(Intrinsic* x);
257   void do_getClass(Intrinsic* x);
258   void do_getObjectSize(Intrinsic* x);
259   void do_currentCarrierThread(Intrinsic* x);
260   void do_extentLocalCache(Intrinsic* x);
261   void do_vthread(Intrinsic* x);
262   void do_JavaThreadField(Intrinsic* x, ByteSize offset);
263   void do_FmaIntrinsic(Intrinsic* x);
264   void do_MathIntrinsic(Intrinsic* x);
265   void do_LibmIntrinsic(Intrinsic* x);
266   void do_ArrayCopy(Intrinsic* x);
267   void do_CompareAndSwap(Intrinsic* x, ValueType* type);
268   void do_PreconditionsCheckIndex(Intrinsic* x, BasicType type);
269   void do_FPIntrinsics(Intrinsic* x);
270   void do_Reference_get(Intrinsic* x);
271   void do_update_CRC32(Intrinsic* x);
272   void do_update_CRC32C(Intrinsic* x);
273   void do_vectorizedMismatch(Intrinsic* x);
274   void do_blackhole(Intrinsic* x);
275 














276  public:
277   LIR_Opr call_runtime(BasicTypeArray* signature, LIRItemList* args, address entry, ValueType* result_type, CodeEmitInfo* info);
278   LIR_Opr call_runtime(BasicTypeArray* signature, LIR_OprList* args, address entry, ValueType* result_type, CodeEmitInfo* info);
279 
280   // convenience functions
281   LIR_Opr call_runtime(Value arg1, address entry, ValueType* result_type, CodeEmitInfo* info);
282   LIR_Opr call_runtime(Value arg1, Value arg2, address entry, ValueType* result_type, CodeEmitInfo* info);
283 
284   // Access API
285 
286  private:
287   BarrierSetC1 *_barrier_set;
288 
289  public:
290   void access_store_at(DecoratorSet decorators, BasicType type,
291                        LIRItem& base, LIR_Opr offset, LIR_Opr value,
292                        CodeEmitInfo* patch_info = NULL, CodeEmitInfo* store_emit_info = NULL);
293 
294   void access_load_at(DecoratorSet decorators, BasicType type,
295                       LIRItem& base, LIR_Opr offset, LIR_Opr result,

309 
310   // These need to guarantee JMM volatile semantics are preserved on each platform
311   // and requires one implementation per architecture.
312   LIR_Opr atomic_cmpxchg(BasicType type, LIR_Opr addr, LIRItem& cmp_value, LIRItem& new_value);
313   LIR_Opr atomic_xchg(BasicType type, LIR_Opr addr, LIRItem& new_value);
314   LIR_Opr atomic_add(BasicType type, LIR_Opr addr, LIRItem& new_value);
315 
316 #ifdef CARDTABLEBARRIERSET_POST_BARRIER_HELPER
317   virtual void CardTableBarrierSet_post_barrier_helper(LIR_Opr addr, LIR_Const* card_table_base);
318 #endif
319 
320   // specific implementations
321   void array_store_check(LIR_Opr value, LIR_Opr array, CodeEmitInfo* store_check_info, ciMethod* profiled_method, int profiled_bci);
322 
323   static LIR_Opr result_register_for(ValueType* type, bool callee = false);
324 
325   ciObject* get_jobject_constant(Value value);
326 
327   LIRItemList* invoke_visit_arguments(Invoke* x);
328   void invoke_load_arguments(Invoke* x, LIRItemList* args, const LIR_OprList* arg_list);
329 
330   void trace_block_entry(BlockBegin* block);
331 
332   // volatile field operations are never patchable because a klass
333   // must be loaded to know it's volatile which means that the offset
334   // it always known as well.
335   void volatile_field_store(LIR_Opr value, LIR_Address* address, CodeEmitInfo* info);
336   void volatile_field_load(LIR_Address* address, LIR_Opr result, CodeEmitInfo* info);
337 
338   void put_Object_unsafe(LIR_Opr src, LIR_Opr offset, LIR_Opr data, BasicType type, bool is_volatile);
339   void get_Object_unsafe(LIR_Opr dest, LIR_Opr src, LIR_Opr offset, BasicType type, bool is_volatile);
340 
341   void arithmetic_call_op (Bytecodes::Code code, LIR_Opr result, LIR_OprList* args);
342 
343   void increment_counter(address counter, BasicType type, int step = 1);
344   void increment_counter(LIR_Address* addr, int step = 1);
345 
346   void arithmetic_op(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, LIR_Opr tmp, CodeEmitInfo* info = NULL);
347   // machine dependent.  returns true if it emitted code for the multiply
348   bool strength_reduce_multiply(LIR_Opr left, jint constant, LIR_Opr result, LIR_Opr tmp);
349 
350   void store_stack_parameter (LIR_Opr opr, ByteSize offset_from_sp_in_bytes);
351 
352   void klass2reg_with_patching(LIR_Opr r, ciMetadata* obj, CodeEmitInfo* info, bool need_resolve = false);
353 
354   // this loads the length and compares against the index
355   void array_range_check          (LIR_Opr array, LIR_Opr index, CodeEmitInfo* null_check_info, CodeEmitInfo* range_check_info);
356 
357   void arithmetic_op_int  (Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, LIR_Opr tmp);
358   void arithmetic_op_long (Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, CodeEmitInfo* info = NULL);
359   void arithmetic_op_fpu  (Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, LIR_Opr tmp = LIR_OprFact::illegalOpr);
360 
361   void shift_op   (Bytecodes::Code code, LIR_Opr dst_reg, LIR_Opr value, LIR_Opr count, LIR_Opr tmp);
362 
363   void logic_op   (Bytecodes::Code code, LIR_Opr dst_reg, LIR_Opr left, LIR_Opr right);
364 
365   void monitor_enter (LIR_Opr object, LIR_Opr lock, LIR_Opr hdr, LIR_Opr scratch, int monitor_no, CodeEmitInfo* info_for_exception, CodeEmitInfo* info);
366   void monitor_exit  (LIR_Opr object, LIR_Opr lock, LIR_Opr hdr, LIR_Opr scratch, int monitor_no);
367 
368   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);
369 
370   // machine dependent
371   void cmp_mem_int(LIR_Condition condition, LIR_Opr base, int disp, int c, CodeEmitInfo* info);
372   void cmp_reg_mem(LIR_Condition condition, LIR_Opr reg, LIR_Opr base, int disp, BasicType type, CodeEmitInfo* info);
373 
374   void arraycopy_helper(Intrinsic* x, int* flags, ciArrayKlass** expected_type);
375 
376   // returns a LIR_Address to address an array location.  May also
377   // emit some code as part of address calculation.  If
378   // needs_card_mark is true then compute the full address for use by
379   // both the store and the card mark.
380   LIR_Address* generate_address(LIR_Opr base,
381                                 LIR_Opr index, int shift,
382                                 int disp,
383                                 BasicType type);
384   LIR_Address* generate_address(LIR_Opr base, int disp, BasicType type) {
385     return generate_address(base, LIR_OprFact::illegalOpr, 0, disp, type);
386   }
387   LIR_Address* emit_array_address(LIR_Opr array_opr, LIR_Opr index_opr, BasicType type);
388 

464 #ifdef __SOFTFP__
465   void do_soft_float_compare(If *x);
466 #endif // __SOFTFP__
467 
468   SwitchRangeArray* create_lookup_ranges(TableSwitch* x);
469   SwitchRangeArray* create_lookup_ranges(LookupSwitch* x);
470   void do_SwitchRanges(SwitchRangeArray* x, LIR_Opr value, BlockBegin* default_sux);
471 
472 #ifdef JFR_HAVE_INTRINSICS
473   void do_getEventWriter(Intrinsic* x);
474 #endif
475 
476   void do_RuntimeCall(address routine, Intrinsic* x);
477 
478   ciKlass* profile_type(ciMethodData* md, int md_first_offset, int md_offset, intptr_t profiled_k,
479                         Value arg, LIR_Opr& mdp, bool not_null, ciKlass* signature_at_call_k,
480                         ciKlass* callee_signature_k);
481   void profile_arguments(ProfileCall* x);
482   void profile_parameters(Base* x);
483   void profile_parameters_at_call(ProfileCall* x);





484   LIR_Opr mask_boolean(LIR_Opr array, LIR_Opr value, CodeEmitInfo*& null_check_info);
485 
486  public:
487   Compilation*  compilation() const              { return _compilation; }
488   FrameMap*     frame_map() const                { return _compilation->frame_map(); }
489   ciMethod*     method() const                   { return _method; }
490   BlockBegin*   block() const                    { return _block; }
491   IRScope*      scope() const                    { return block()->scope(); }
492 
493   int max_virtual_register_number() const        { return _virtual_register_number; }
494 
495   void block_do(BlockBegin* block);
496 
497   // Flags that can be set on vregs
498   enum VregFlag {
499       must_start_in_memory = 0  // needs to be assigned a memory location at beginning, but may then be loaded in a register
500     , callee_saved     = 1    // must be in a callee saved register
501     , byte_reg         = 2    // must be in a byte register
502     , num_vreg_flags
503 
504   };
505 
506   LIRGenerator(Compilation* compilation, ciMethod* method)
507     : _compilation(compilation)
508     , _method(method)
509     , _virtual_register_number(LIR_Opr::vreg_base)
510     , _vreg_flags(num_vreg_flags)

511     , _barrier_set(BarrierSet::barrier_set()->barrier_set_c1()) {
512   }
513 
514   // for virtual registers, maps them back to Phi's or Local's
515   Instruction* instruction_for_opr(LIR_Opr opr);
516   Instruction* instruction_for_vreg(int reg_num);
517 
518   void set_vreg_flag   (int vreg_num, VregFlag f);
519   bool is_vreg_flag_set(int vreg_num, VregFlag f);
520   void set_vreg_flag   (LIR_Opr opr,  VregFlag f) { set_vreg_flag(opr->vreg_number(), f); }
521   bool is_vreg_flag_set(LIR_Opr opr,  VregFlag f) { return is_vreg_flag_set(opr->vreg_number(), f); }
522 
523   // statics
524   static LIR_Opr exceptionOopOpr();
525   static LIR_Opr exceptionPcOpr();
526   static LIR_Opr divInOpr();
527   static LIR_Opr divOutOpr();
528   static LIR_Opr remOutOpr();
529 #ifdef S390
530   // On S390 we can do ldiv, lrem without RT call.

544   // visitor functionality
545   virtual void do_Phi            (Phi*             x);
546   virtual void do_Local          (Local*           x);
547   virtual void do_Constant       (Constant*        x);
548   virtual void do_LoadField      (LoadField*       x);
549   virtual void do_StoreField     (StoreField*      x);
550   virtual void do_ArrayLength    (ArrayLength*     x);
551   virtual void do_LoadIndexed    (LoadIndexed*     x);
552   virtual void do_StoreIndexed   (StoreIndexed*    x);
553   virtual void do_NegateOp       (NegateOp*        x);
554   virtual void do_ArithmeticOp   (ArithmeticOp*    x);
555   virtual void do_ShiftOp        (ShiftOp*         x);
556   virtual void do_LogicOp        (LogicOp*         x);
557   virtual void do_CompareOp      (CompareOp*       x);
558   virtual void do_IfOp           (IfOp*            x);
559   virtual void do_Convert        (Convert*         x);
560   virtual void do_NullCheck      (NullCheck*       x);
561   virtual void do_TypeCast       (TypeCast*        x);
562   virtual void do_Invoke         (Invoke*          x);
563   virtual void do_NewInstance    (NewInstance*     x);

564   virtual void do_NewTypeArray   (NewTypeArray*    x);
565   virtual void do_NewObjectArray (NewObjectArray*  x);
566   virtual void do_NewMultiArray  (NewMultiArray*   x);

567   virtual void do_CheckCast      (CheckCast*       x);
568   virtual void do_InstanceOf     (InstanceOf*      x);
569   virtual void do_MonitorEnter   (MonitorEnter*    x);
570   virtual void do_MonitorExit    (MonitorExit*     x);
571   virtual void do_Intrinsic      (Intrinsic*       x);
572   virtual void do_BlockBegin     (BlockBegin*      x);
573   virtual void do_Goto           (Goto*            x);
574   virtual void do_If             (If*              x);
575   virtual void do_TableSwitch    (TableSwitch*     x);
576   virtual void do_LookupSwitch   (LookupSwitch*    x);
577   virtual void do_Return         (Return*          x);
578   virtual void do_Throw          (Throw*           x);
579   virtual void do_Base           (Base*            x);
580   virtual void do_OsrEntry       (OsrEntry*        x);
581   virtual void do_ExceptionObject(ExceptionObject* x);
582   virtual void do_RoundFP        (RoundFP*         x);
583   virtual void do_UnsafeGet      (UnsafeGet*       x);
584   virtual void do_UnsafePut      (UnsafePut*       x);
585   virtual void do_UnsafeGetAndSet(UnsafeGetAndSet* x);
586   virtual void do_ProfileCall    (ProfileCall*     x);
587   virtual void do_ProfileReturnType (ProfileReturnType* x);
588   virtual void do_ProfileInvoke  (ProfileInvoke*   x);

589   virtual void do_RuntimeCall    (RuntimeCall*     x);
590   virtual void do_MemBar         (MemBar*          x);
591   virtual void do_RangeCheckPredicate(RangeCheckPredicate* x);
592 #ifdef ASSERT
593   virtual void do_Assert         (Assert*          x);
594 #endif
595 
596 #ifdef C1_LIRGENERATOR_MD_HPP
597 #include C1_LIRGENERATOR_MD_HPP
598 #endif
599 };
600 
601 
602 class LIRItem: public CompilationResourceObj {
603  private:
604   Value         _value;
605   LIRGenerator* _gen;
606   LIR_Opr       _result;
607   bool          _destroys_register;
608   LIR_Opr       _new_result;

152 };
153 
154 
155 // only the classes below belong in the same file
156 class LIRGenerator: public InstructionVisitor, public BlockClosure {
157  // LIRGenerator should never get instatiated on the heap.
158  private:
159   void* operator new(size_t size) throw();
160   void* operator new[](size_t size) throw();
161   void operator delete(void* p) { ShouldNotReachHere(); }
162   void operator delete[](void* p) { ShouldNotReachHere(); }
163 
164   Compilation*  _compilation;
165   ciMethod*     _method;    // method that we are compiling
166   PhiResolverState  _resolver_state;
167   BlockBegin*   _block;
168   int           _virtual_register_number;
169   Values        _instruction_for_operand;
170   BitMap2D      _vreg_flags; // flags which can be set on a per-vreg basis
171   LIR_List*     _lir;
172   bool          _in_conditional_code;
173 
174   LIRGenerator* gen() {
175     return this;
176   }
177 
178   void print_if_not_loaded(const NewInstance* new_instance) PRODUCT_RETURN;
179 
180  public:
181 #ifdef ASSERT
182   LIR_List* lir(const char * file, int line) const {
183     _lir->set_file_and_line(file, line);
184     return _lir;
185   }
186 #endif
187   LIR_List* lir() const {
188     return _lir;
189   }
190 
191  private:
192   // a simple cache of constants used within a block
193   GrowableArray<LIR_Const*>       _constants;
194   LIR_OprList                     _reg_for_constants;
195   Values                          _unpinned_constants;
196 
197   friend class PhiResolver;
198 
199   void set_in_conditional_code(bool v);
200  public:
201   // unified bailout support
202   void bailout(const char* msg) const            { compilation()->bailout(msg); }
203   bool bailed_out() const                        { return compilation()->bailed_out(); }
204 
205   void block_do_prolog(BlockBegin* block);
206   void block_do_epilog(BlockBegin* block);
207 
208   // register allocation
209   LIR_Opr rlock(Value instr);                      // lock a free register
210   LIR_Opr rlock_result(Value instr);
211   LIR_Opr rlock_result(Value instr, BasicType type);
212   LIR_Opr rlock_byte(BasicType type);
213   LIR_Opr rlock_callee_saved(BasicType type);
214 
215   // get a constant into a register and get track of what register was used
216   LIR_Opr load_constant(Constant* x);
217   LIR_Opr load_constant(LIR_Const* constant);
218 
219   bool in_conditional_code() { return _in_conditional_code; }
220   // Given an immediate value, return an operand usable in logical ops.
221   LIR_Opr load_immediate(jlong x, BasicType type);
222 
223   void  set_result(Value x, LIR_Opr opr)           {
224     assert(opr->is_valid(), "must set to valid value");
225     assert(x->operand()->is_illegal(), "operand should never change");
226     assert(!opr->is_register() || opr->is_virtual(), "should never set result to a physical register");
227     x->set_operand(opr);
228     assert(opr == x->operand(), "must be");
229     if (opr->is_virtual()) {
230       _instruction_for_operand.at_put_grow(opr->vreg_number(), x, NULL);
231     }
232   }
233   void  set_no_result(Value x)                     { assert(!x->has_uses(), "can't have use"); x->clear_operand(); }
234 
235   friend class LIRItem;
236 
237   LIR_Opr round_item(LIR_Opr opr);
238   LIR_Opr force_to_spill(LIR_Opr value, BasicType t);
239 

259   void do_getModifiers(Intrinsic* x);
260   void do_getClass(Intrinsic* x);
261   void do_getObjectSize(Intrinsic* x);
262   void do_currentCarrierThread(Intrinsic* x);
263   void do_extentLocalCache(Intrinsic* x);
264   void do_vthread(Intrinsic* x);
265   void do_JavaThreadField(Intrinsic* x, ByteSize offset);
266   void do_FmaIntrinsic(Intrinsic* x);
267   void do_MathIntrinsic(Intrinsic* x);
268   void do_LibmIntrinsic(Intrinsic* x);
269   void do_ArrayCopy(Intrinsic* x);
270   void do_CompareAndSwap(Intrinsic* x, ValueType* type);
271   void do_PreconditionsCheckIndex(Intrinsic* x, BasicType type);
272   void do_FPIntrinsics(Intrinsic* x);
273   void do_Reference_get(Intrinsic* x);
274   void do_update_CRC32(Intrinsic* x);
275   void do_update_CRC32C(Intrinsic* x);
276   void do_vectorizedMismatch(Intrinsic* x);
277   void do_blackhole(Intrinsic* x);
278 
279   bool inline_type_field_access_prolog(AccessField* x);
280   void access_flattened_array(bool is_load, LIRItem& array, LIRItem& index, LIRItem& obj_item, ciField* field = NULL, int offset = 0);
281   void access_sub_element(LIRItem& array, LIRItem& index, LIR_Opr& result, ciField* field, int sub_offset);
282   LIR_Opr get_and_load_element_address(LIRItem& array, LIRItem& index);
283   bool needs_flattened_array_store_check(StoreIndexed* x);
284   void check_flattened_array(LIR_Opr array, LIR_Opr value, CodeStub* slow_path);
285   bool needs_null_free_array_store_check(StoreIndexed* x);
286   void check_null_free_array(LIRItem& array, LIRItem& value,  CodeEmitInfo* info);
287   void substitutability_check(IfOp* x, LIRItem& left, LIRItem& right, LIRItem& t_val, LIRItem& f_val);
288   void substitutability_check(If* x, LIRItem& left, LIRItem& right);
289   void substitutability_check_common(Value left_val, Value right_val, LIRItem& left, LIRItem& right,
290                                      LIR_Opr equal_result, LIR_Opr not_equal_result, LIR_Opr result, CodeEmitInfo* info);
291   void init_temps_for_substitutability_check(LIR_Opr& tmp1, LIR_Opr& tmp2);
292 
293  public:
294   LIR_Opr call_runtime(BasicTypeArray* signature, LIRItemList* args, address entry, ValueType* result_type, CodeEmitInfo* info);
295   LIR_Opr call_runtime(BasicTypeArray* signature, LIR_OprList* args, address entry, ValueType* result_type, CodeEmitInfo* info);
296 
297   // convenience functions
298   LIR_Opr call_runtime(Value arg1, address entry, ValueType* result_type, CodeEmitInfo* info);
299   LIR_Opr call_runtime(Value arg1, Value arg2, address entry, ValueType* result_type, CodeEmitInfo* info);
300 
301   // Access API
302 
303  private:
304   BarrierSetC1 *_barrier_set;
305 
306  public:
307   void access_store_at(DecoratorSet decorators, BasicType type,
308                        LIRItem& base, LIR_Opr offset, LIR_Opr value,
309                        CodeEmitInfo* patch_info = NULL, CodeEmitInfo* store_emit_info = NULL);
310 
311   void access_load_at(DecoratorSet decorators, BasicType type,
312                       LIRItem& base, LIR_Opr offset, LIR_Opr result,

326 
327   // These need to guarantee JMM volatile semantics are preserved on each platform
328   // and requires one implementation per architecture.
329   LIR_Opr atomic_cmpxchg(BasicType type, LIR_Opr addr, LIRItem& cmp_value, LIRItem& new_value);
330   LIR_Opr atomic_xchg(BasicType type, LIR_Opr addr, LIRItem& new_value);
331   LIR_Opr atomic_add(BasicType type, LIR_Opr addr, LIRItem& new_value);
332 
333 #ifdef CARDTABLEBARRIERSET_POST_BARRIER_HELPER
334   virtual void CardTableBarrierSet_post_barrier_helper(LIR_Opr addr, LIR_Const* card_table_base);
335 #endif
336 
337   // specific implementations
338   void array_store_check(LIR_Opr value, LIR_Opr array, CodeEmitInfo* store_check_info, ciMethod* profiled_method, int profiled_bci);
339 
340   static LIR_Opr result_register_for(ValueType* type, bool callee = false);
341 
342   ciObject* get_jobject_constant(Value value);
343 
344   LIRItemList* invoke_visit_arguments(Invoke* x);
345   void invoke_load_arguments(Invoke* x, LIRItemList* args, const LIR_OprList* arg_list);
346   void invoke_load_one_argument(LIRItem* param, LIR_Opr loc);
347   void trace_block_entry(BlockBegin* block);
348 
349   // volatile field operations are never patchable because a klass
350   // must be loaded to know it's volatile which means that the offset
351   // it always known as well.
352   void volatile_field_store(LIR_Opr value, LIR_Address* address, CodeEmitInfo* info);
353   void volatile_field_load(LIR_Address* address, LIR_Opr result, CodeEmitInfo* info);
354 
355   void put_Object_unsafe(LIR_Opr src, LIR_Opr offset, LIR_Opr data, BasicType type, bool is_volatile);
356   void get_Object_unsafe(LIR_Opr dest, LIR_Opr src, LIR_Opr offset, BasicType type, bool is_volatile);
357 
358   void arithmetic_call_op (Bytecodes::Code code, LIR_Opr result, LIR_OprList* args);
359 
360   void increment_counter(address counter, BasicType type, int step = 1);
361   void increment_counter(LIR_Address* addr, int step = 1);
362 
363   void arithmetic_op(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, LIR_Opr tmp, CodeEmitInfo* info = NULL);
364   // machine dependent.  returns true if it emitted code for the multiply
365   bool strength_reduce_multiply(LIR_Opr left, jint constant, LIR_Opr result, LIR_Opr tmp);
366 
367   void store_stack_parameter (LIR_Opr opr, ByteSize offset_from_sp_in_bytes);
368 
369   void klass2reg_with_patching(LIR_Opr r, ciMetadata* obj, CodeEmitInfo* info, bool need_resolve = false);
370 
371   // this loads the length and compares against the index
372   void array_range_check          (LIR_Opr array, LIR_Opr index, CodeEmitInfo* null_check_info, CodeEmitInfo* range_check_info);
373 
374   void arithmetic_op_int  (Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, LIR_Opr tmp);
375   void arithmetic_op_long (Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, CodeEmitInfo* info = NULL);
376   void arithmetic_op_fpu  (Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, LIR_Opr tmp = LIR_OprFact::illegalOpr);
377 
378   void shift_op   (Bytecodes::Code code, LIR_Opr dst_reg, LIR_Opr value, LIR_Opr count, LIR_Opr tmp);
379 
380   void logic_op   (Bytecodes::Code code, LIR_Opr dst_reg, LIR_Opr left, LIR_Opr right);
381 
382   void monitor_enter (LIR_Opr object, LIR_Opr lock, LIR_Opr hdr, LIR_Opr scratch, int monitor_no, CodeEmitInfo* info_for_exception, CodeEmitInfo* info, CodeStub* throw_imse_stub);
383   void monitor_exit  (LIR_Opr object, LIR_Opr lock, LIR_Opr hdr, LIR_Opr scratch, int monitor_no);
384 
385   void new_instance(LIR_Opr dst, ciInstanceKlass* klass, bool is_unresolved, bool allow_inline, LIR_Opr scratch1, LIR_Opr scratch2, LIR_Opr scratch3, LIR_Opr scratch4, LIR_Opr klass_reg, CodeEmitInfo* info);
386 
387   // machine dependent
388   void cmp_mem_int(LIR_Condition condition, LIR_Opr base, int disp, int c, CodeEmitInfo* info);
389   void cmp_reg_mem(LIR_Condition condition, LIR_Opr reg, LIR_Opr base, int disp, BasicType type, CodeEmitInfo* info);
390 
391   void arraycopy_helper(Intrinsic* x, int* flags, ciArrayKlass** expected_type);
392 
393   // returns a LIR_Address to address an array location.  May also
394   // emit some code as part of address calculation.  If
395   // needs_card_mark is true then compute the full address for use by
396   // both the store and the card mark.
397   LIR_Address* generate_address(LIR_Opr base,
398                                 LIR_Opr index, int shift,
399                                 int disp,
400                                 BasicType type);
401   LIR_Address* generate_address(LIR_Opr base, int disp, BasicType type) {
402     return generate_address(base, LIR_OprFact::illegalOpr, 0, disp, type);
403   }
404   LIR_Address* emit_array_address(LIR_Opr array_opr, LIR_Opr index_opr, BasicType type);
405 

481 #ifdef __SOFTFP__
482   void do_soft_float_compare(If *x);
483 #endif // __SOFTFP__
484 
485   SwitchRangeArray* create_lookup_ranges(TableSwitch* x);
486   SwitchRangeArray* create_lookup_ranges(LookupSwitch* x);
487   void do_SwitchRanges(SwitchRangeArray* x, LIR_Opr value, BlockBegin* default_sux);
488 
489 #ifdef JFR_HAVE_INTRINSICS
490   void do_getEventWriter(Intrinsic* x);
491 #endif
492 
493   void do_RuntimeCall(address routine, Intrinsic* x);
494 
495   ciKlass* profile_type(ciMethodData* md, int md_first_offset, int md_offset, intptr_t profiled_k,
496                         Value arg, LIR_Opr& mdp, bool not_null, ciKlass* signature_at_call_k,
497                         ciKlass* callee_signature_k);
498   void profile_arguments(ProfileCall* x);
499   void profile_parameters(Base* x);
500   void profile_parameters_at_call(ProfileCall* x);
501   void profile_flags(ciMethodData* md, ciProfileData* load_store, int flag, LIR_Condition condition = lir_cond_always);
502   void profile_null_free_array(LIRItem array, ciMethodData* md, ciArrayLoadStoreData* load_store);
503   void profile_array_type(AccessIndexed* x, ciMethodData*& md, ciArrayLoadStoreData*& load_store);
504   void profile_element_type(Value element, ciMethodData* md, ciArrayLoadStoreData* load_store);
505   bool profile_inline_klass(ciMethodData* md, ciProfileData* data, Value value, int flag);
506   LIR_Opr mask_boolean(LIR_Opr array, LIR_Opr value, CodeEmitInfo*& null_check_info);
507 
508  public:
509   Compilation*  compilation() const              { return _compilation; }
510   FrameMap*     frame_map() const                { return _compilation->frame_map(); }
511   ciMethod*     method() const                   { return _method; }
512   BlockBegin*   block() const                    { return _block; }
513   IRScope*      scope() const                    { return block()->scope(); }
514 
515   int max_virtual_register_number() const        { return _virtual_register_number; }
516 
517   void block_do(BlockBegin* block);
518 
519   // Flags that can be set on vregs
520   enum VregFlag {
521       must_start_in_memory = 0  // needs to be assigned a memory location at beginning, but may then be loaded in a register
522     , callee_saved     = 1    // must be in a callee saved register
523     , byte_reg         = 2    // must be in a byte register
524     , num_vreg_flags
525 
526   };
527 
528   LIRGenerator(Compilation* compilation, ciMethod* method)
529     : _compilation(compilation)
530     , _method(method)
531     , _virtual_register_number(LIR_Opr::vreg_base)
532     , _vreg_flags(num_vreg_flags)
533     , _in_conditional_code(false)
534     , _barrier_set(BarrierSet::barrier_set()->barrier_set_c1()) {
535   }
536 
537   // for virtual registers, maps them back to Phi's or Local's
538   Instruction* instruction_for_opr(LIR_Opr opr);
539   Instruction* instruction_for_vreg(int reg_num);
540 
541   void set_vreg_flag   (int vreg_num, VregFlag f);
542   bool is_vreg_flag_set(int vreg_num, VregFlag f);
543   void set_vreg_flag   (LIR_Opr opr,  VregFlag f) { set_vreg_flag(opr->vreg_number(), f); }
544   bool is_vreg_flag_set(LIR_Opr opr,  VregFlag f) { return is_vreg_flag_set(opr->vreg_number(), f); }
545 
546   // statics
547   static LIR_Opr exceptionOopOpr();
548   static LIR_Opr exceptionPcOpr();
549   static LIR_Opr divInOpr();
550   static LIR_Opr divOutOpr();
551   static LIR_Opr remOutOpr();
552 #ifdef S390
553   // On S390 we can do ldiv, lrem without RT call.

567   // visitor functionality
568   virtual void do_Phi            (Phi*             x);
569   virtual void do_Local          (Local*           x);
570   virtual void do_Constant       (Constant*        x);
571   virtual void do_LoadField      (LoadField*       x);
572   virtual void do_StoreField     (StoreField*      x);
573   virtual void do_ArrayLength    (ArrayLength*     x);
574   virtual void do_LoadIndexed    (LoadIndexed*     x);
575   virtual void do_StoreIndexed   (StoreIndexed*    x);
576   virtual void do_NegateOp       (NegateOp*        x);
577   virtual void do_ArithmeticOp   (ArithmeticOp*    x);
578   virtual void do_ShiftOp        (ShiftOp*         x);
579   virtual void do_LogicOp        (LogicOp*         x);
580   virtual void do_CompareOp      (CompareOp*       x);
581   virtual void do_IfOp           (IfOp*            x);
582   virtual void do_Convert        (Convert*         x);
583   virtual void do_NullCheck      (NullCheck*       x);
584   virtual void do_TypeCast       (TypeCast*        x);
585   virtual void do_Invoke         (Invoke*          x);
586   virtual void do_NewInstance    (NewInstance*     x);
587   virtual void do_NewInlineTypeInstance(NewInlineTypeInstance* x);
588   virtual void do_NewTypeArray   (NewTypeArray*    x);
589   virtual void do_NewObjectArray (NewObjectArray*  x);
590   virtual void do_NewMultiArray  (NewMultiArray*   x);
591   virtual void do_Deoptimize     (Deoptimize*      x);
592   virtual void do_CheckCast      (CheckCast*       x);
593   virtual void do_InstanceOf     (InstanceOf*      x);
594   virtual void do_MonitorEnter   (MonitorEnter*    x);
595   virtual void do_MonitorExit    (MonitorExit*     x);
596   virtual void do_Intrinsic      (Intrinsic*       x);
597   virtual void do_BlockBegin     (BlockBegin*      x);
598   virtual void do_Goto           (Goto*            x);
599   virtual void do_If             (If*              x);
600   virtual void do_TableSwitch    (TableSwitch*     x);
601   virtual void do_LookupSwitch   (LookupSwitch*    x);
602   virtual void do_Return         (Return*          x);
603   virtual void do_Throw          (Throw*           x);
604   virtual void do_Base           (Base*            x);
605   virtual void do_OsrEntry       (OsrEntry*        x);
606   virtual void do_ExceptionObject(ExceptionObject* x);
607   virtual void do_RoundFP        (RoundFP*         x);
608   virtual void do_UnsafeGet      (UnsafeGet*       x);
609   virtual void do_UnsafePut      (UnsafePut*       x);
610   virtual void do_UnsafeGetAndSet(UnsafeGetAndSet* x);
611   virtual void do_ProfileCall    (ProfileCall*     x);
612   virtual void do_ProfileReturnType (ProfileReturnType* x);
613   virtual void do_ProfileInvoke  (ProfileInvoke*   x);
614   virtual void do_ProfileACmpTypes(ProfileACmpTypes* x);
615   virtual void do_RuntimeCall    (RuntimeCall*     x);
616   virtual void do_MemBar         (MemBar*          x);
617   virtual void do_RangeCheckPredicate(RangeCheckPredicate* x);
618 #ifdef ASSERT
619   virtual void do_Assert         (Assert*          x);
620 #endif
621 
622 #ifdef C1_LIRGENERATOR_MD_HPP
623 #include C1_LIRGENERATOR_MD_HPP
624 #endif
625 };
626 
627 
628 class LIRItem: public CompilationResourceObj {
629  private:
630   Value         _value;
631   LIRGenerator* _gen;
632   LIR_Opr       _result;
633   bool          _destroys_register;
634   LIR_Opr       _new_result;
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