handler-compiler-s390.cc revision bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8 
1// Copyright 2015 the V8 project authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#if V8_TARGET_ARCH_S390
6
7#include "src/ic/handler-compiler.h"
8
9#include "src/api-arguments.h"
10#include "src/field-type.h"
11#include "src/ic/call-optimization.h"
12#include "src/ic/ic.h"
13#include "src/isolate-inl.h"
14
15namespace v8 {
16namespace internal {
17
18#define __ ACCESS_MASM(masm)
19
20void NamedLoadHandlerCompiler::GenerateLoadViaGetter(
21    MacroAssembler* masm, Handle<Map> map, Register receiver, Register holder,
22    int accessor_index, int expected_arguments, Register scratch) {
23  // ----------- S t a t e -------------
24  //  -- r2    : receiver
25  //  -- r4    : name
26  //  -- lr    : return address
27  // -----------------------------------
28  {
29    FrameScope scope(masm, StackFrame::INTERNAL);
30
31    // Save context register
32    __ push(cp);
33
34    if (accessor_index >= 0) {
35      DCHECK(!holder.is(scratch));
36      DCHECK(!receiver.is(scratch));
37      // Call the JavaScript getter with the receiver on the stack.
38      if (map->IsJSGlobalObjectMap()) {
39        // Swap in the global receiver.
40        __ LoadP(scratch,
41                 FieldMemOperand(receiver, JSGlobalObject::kGlobalProxyOffset));
42        receiver = scratch;
43      }
44      __ Push(receiver);
45      __ LoadAccessor(r3, holder, accessor_index, ACCESSOR_GETTER);
46      __ LoadImmP(r2, Operand::Zero());
47      __ Call(masm->isolate()->builtins()->CallFunction(
48                  ConvertReceiverMode::kNotNullOrUndefined),
49              RelocInfo::CODE_TARGET);
50    } else {
51      // If we generate a global code snippet for deoptimization only, remember
52      // the place to continue after deoptimization.
53      masm->isolate()->heap()->SetGetterStubDeoptPCOffset(masm->pc_offset());
54    }
55
56    // Restore context register.
57    __ pop(cp);
58  }
59  __ Ret();
60}
61
62void NamedStoreHandlerCompiler::GenerateStoreViaSetter(
63    MacroAssembler* masm, Handle<Map> map, Register receiver, Register holder,
64    int accessor_index, int expected_arguments, Register scratch) {
65  // ----------- S t a t e -------------
66  //  -- lr    : return address
67  // -----------------------------------
68  {
69    FrameScope scope(masm, StackFrame::INTERNAL);
70
71    // Save context register
72    // Save value register, so we can restore it later.
73    __ Push(cp, value());
74
75    if (accessor_index >= 0) {
76      DCHECK(!holder.is(scratch));
77      DCHECK(!receiver.is(scratch));
78      DCHECK(!value().is(scratch));
79      // Call the JavaScript setter with receiver and value on the stack.
80      if (map->IsJSGlobalObjectMap()) {
81        // Swap in the global receiver.
82        __ LoadP(scratch,
83                 FieldMemOperand(receiver, JSGlobalObject::kGlobalProxyOffset));
84        receiver = scratch;
85      }
86      __ Push(receiver, value());
87      __ LoadAccessor(r3, holder, accessor_index, ACCESSOR_SETTER);
88      __ LoadImmP(r2, Operand(1));
89      __ Call(masm->isolate()->builtins()->CallFunction(
90                  ConvertReceiverMode::kNotNullOrUndefined),
91              RelocInfo::CODE_TARGET);
92    } else {
93      // If we generate a global code snippet for deoptimization only, remember
94      // the place to continue after deoptimization.
95      masm->isolate()->heap()->SetSetterStubDeoptPCOffset(masm->pc_offset());
96    }
97
98    // We have to return the passed value, not the return value of the setter.
99    // Restore context register.
100    __ Pop(cp, r2);
101  }
102  __ Ret();
103}
104
105void PropertyHandlerCompiler::PushVectorAndSlot(Register vector,
106                                                Register slot) {
107  MacroAssembler* masm = this->masm();
108  __ Push(vector, slot);
109}
110
111void PropertyHandlerCompiler::PopVectorAndSlot(Register vector, Register slot) {
112  MacroAssembler* masm = this->masm();
113  __ Pop(vector, slot);
114}
115
116void PropertyHandlerCompiler::DiscardVectorAndSlot() {
117  MacroAssembler* masm = this->masm();
118  // Remove vector and slot.
119  __ la(sp, MemOperand(sp, 2 * kPointerSize));
120}
121
122void PropertyHandlerCompiler::GenerateDictionaryNegativeLookup(
123    MacroAssembler* masm, Label* miss_label, Register receiver,
124    Handle<Name> name, Register scratch0, Register scratch1) {
125  DCHECK(name->IsUniqueName());
126  DCHECK(!receiver.is(scratch0));
127  Counters* counters = masm->isolate()->counters();
128  __ IncrementCounter(counters->negative_lookups(), 1, scratch0, scratch1);
129  __ IncrementCounter(counters->negative_lookups_miss(), 1, scratch0, scratch1);
130
131  Label done;
132
133  const int kInterceptorOrAccessCheckNeededMask =
134      (1 << Map::kHasNamedInterceptor) | (1 << Map::kIsAccessCheckNeeded);
135
136  // Bail out if the receiver has a named interceptor or requires access checks.
137  Register map = scratch1;
138  __ LoadP(map, FieldMemOperand(receiver, HeapObject::kMapOffset));
139  __ LoadlB(scratch0, FieldMemOperand(map, Map::kBitFieldOffset));
140  __ AndP(r0, scratch0, Operand(kInterceptorOrAccessCheckNeededMask));
141  __ bne(miss_label);
142
143  // Check that receiver is a JSObject.
144  // TODO(joransiu): Merge into SI compare
145  __ LoadlB(scratch0, FieldMemOperand(map, Map::kInstanceTypeOffset));
146  __ CmpP(scratch0, Operand(FIRST_JS_RECEIVER_TYPE));
147  __ blt(miss_label);
148
149  // Load properties array.
150  Register properties = scratch0;
151  __ LoadP(properties, FieldMemOperand(receiver, JSObject::kPropertiesOffset));
152  // Check that the properties array is a dictionary.
153  __ LoadP(map, FieldMemOperand(properties, HeapObject::kMapOffset));
154  __ CompareRoot(map, Heap::kHashTableMapRootIndex);
155  __ bne(miss_label);
156
157  // Restore the temporarily used register.
158  __ LoadP(properties, FieldMemOperand(receiver, JSObject::kPropertiesOffset));
159
160  NameDictionaryLookupStub::GenerateNegativeLookup(
161      masm, miss_label, &done, receiver, properties, name, scratch1);
162  __ bind(&done);
163  __ DecrementCounter(counters->negative_lookups_miss(), 1, scratch0, scratch1);
164}
165
166void NamedLoadHandlerCompiler::GenerateDirectLoadGlobalFunctionPrototype(
167    MacroAssembler* masm, int index, Register result, Label* miss) {
168  __ LoadNativeContextSlot(index, result);
169  // Load its initial map. The global functions all have initial maps.
170  __ LoadP(result,
171           FieldMemOperand(result, JSFunction::kPrototypeOrInitialMapOffset));
172  // Load the prototype from the initial map.
173  __ LoadP(result, FieldMemOperand(result, Map::kPrototypeOffset));
174}
175
176void NamedLoadHandlerCompiler::GenerateLoadFunctionPrototype(
177    MacroAssembler* masm, Register receiver, Register scratch1,
178    Register scratch2, Label* miss_label) {
179  __ TryGetFunctionPrototype(receiver, scratch1, scratch2, miss_label);
180  __ LoadRR(r2, scratch1);
181  __ Ret();
182}
183
184// Generate code to check that a global property cell is empty. Create
185// the property cell at compilation time if no cell exists for the
186// property.
187void PropertyHandlerCompiler::GenerateCheckPropertyCell(
188    MacroAssembler* masm, Handle<JSGlobalObject> global, Handle<Name> name,
189    Register scratch, Label* miss) {
190  Handle<PropertyCell> cell = JSGlobalObject::EnsurePropertyCell(global, name);
191  DCHECK(cell->value()->IsTheHole());
192  Handle<WeakCell> weak_cell = masm->isolate()->factory()->NewWeakCell(cell);
193  __ LoadWeakValue(scratch, weak_cell, miss);
194  __ LoadP(scratch, FieldMemOperand(scratch, PropertyCell::kValueOffset));
195  __ CompareRoot(scratch, Heap::kTheHoleValueRootIndex);
196  __ bne(miss);
197}
198
199static void PushInterceptorArguments(MacroAssembler* masm, Register receiver,
200                                     Register holder, Register name,
201                                     Handle<JSObject> holder_obj) {
202  STATIC_ASSERT(NamedLoadHandlerCompiler::kInterceptorArgsNameIndex == 0);
203  STATIC_ASSERT(NamedLoadHandlerCompiler::kInterceptorArgsThisIndex == 1);
204  STATIC_ASSERT(NamedLoadHandlerCompiler::kInterceptorArgsHolderIndex == 2);
205  STATIC_ASSERT(NamedLoadHandlerCompiler::kInterceptorArgsLength == 3);
206  __ Push(name);
207  __ Push(receiver);
208  __ Push(holder);
209}
210
211static void CompileCallLoadPropertyWithInterceptor(
212    MacroAssembler* masm, Register receiver, Register holder, Register name,
213    Handle<JSObject> holder_obj, Runtime::FunctionId id) {
214  DCHECK(NamedLoadHandlerCompiler::kInterceptorArgsLength ==
215         Runtime::FunctionForId(id)->nargs);
216  PushInterceptorArguments(masm, receiver, holder, name, holder_obj);
217  __ CallRuntime(id);
218}
219
220// Generate call to api function.
221void PropertyHandlerCompiler::GenerateApiAccessorCall(
222    MacroAssembler* masm, const CallOptimization& optimization,
223    Handle<Map> receiver_map, Register receiver, Register scratch_in,
224    bool is_store, Register store_parameter, Register accessor_holder,
225    int accessor_index) {
226  DCHECK(!accessor_holder.is(scratch_in));
227  DCHECK(!receiver.is(scratch_in));
228  __ Push(receiver);
229  // Write the arguments to stack frame.
230  if (is_store) {
231    DCHECK(!receiver.is(store_parameter));
232    DCHECK(!scratch_in.is(store_parameter));
233    __ Push(store_parameter);
234  }
235  DCHECK(optimization.is_simple_api_call());
236
237  // Abi for CallApiCallbackStub.
238  Register callee = r2;
239  Register data = r6;
240  Register holder = r4;
241  Register api_function_address = r3;
242
243  // Put callee in place.
244  __ LoadAccessor(callee, accessor_holder, accessor_index,
245                  is_store ? ACCESSOR_SETTER : ACCESSOR_GETTER);
246
247  // Put holder in place.
248  CallOptimization::HolderLookup holder_lookup;
249  int holder_depth = 0;
250  optimization.LookupHolderOfExpectedType(receiver_map, &holder_lookup,
251                                          &holder_depth);
252  switch (holder_lookup) {
253    case CallOptimization::kHolderIsReceiver:
254      __ Move(holder, receiver);
255      break;
256    case CallOptimization::kHolderFound:
257      __ LoadP(holder, FieldMemOperand(receiver, HeapObject::kMapOffset));
258      __ LoadP(holder, FieldMemOperand(holder, Map::kPrototypeOffset));
259      for (int i = 1; i < holder_depth; i++) {
260        __ LoadP(holder, FieldMemOperand(holder, HeapObject::kMapOffset));
261        __ LoadP(holder, FieldMemOperand(holder, Map::kPrototypeOffset));
262      }
263      break;
264    case CallOptimization::kHolderNotFound:
265      UNREACHABLE();
266      break;
267  }
268
269  Isolate* isolate = masm->isolate();
270  Handle<CallHandlerInfo> api_call_info = optimization.api_call_info();
271  bool call_data_undefined = false;
272  // Put call data in place.
273  if (api_call_info->data()->IsUndefined()) {
274    call_data_undefined = true;
275    __ LoadRoot(data, Heap::kUndefinedValueRootIndex);
276  } else {
277    if (optimization.is_constant_call()) {
278      __ LoadP(data,
279               FieldMemOperand(callee, JSFunction::kSharedFunctionInfoOffset));
280      __ LoadP(data,
281               FieldMemOperand(data, SharedFunctionInfo::kFunctionDataOffset));
282      __ LoadP(data,
283               FieldMemOperand(data, FunctionTemplateInfo::kCallCodeOffset));
284    } else {
285      __ LoadP(data,
286               FieldMemOperand(callee, FunctionTemplateInfo::kCallCodeOffset));
287    }
288    __ LoadP(data, FieldMemOperand(data, CallHandlerInfo::kDataOffset));
289  }
290
291  if (api_call_info->fast_handler()->IsCode()) {
292    // Just tail call into the fast handler if present.
293    __ Jump(handle(Code::cast(api_call_info->fast_handler())),
294            RelocInfo::CODE_TARGET);
295    return;
296  }
297
298  // Put api_function_address in place.
299  Address function_address = v8::ToCData<Address>(api_call_info->callback());
300  ApiFunction fun(function_address);
301  ExternalReference::Type type = ExternalReference::DIRECT_API_CALL;
302  ExternalReference ref = ExternalReference(&fun, type, masm->isolate());
303  __ mov(api_function_address, Operand(ref));
304
305  // Jump to stub.
306  CallApiCallbackStub stub(isolate, is_store, call_data_undefined,
307                           !optimization.is_constant_call());
308  __ TailCallStub(&stub);
309}
310
311static void StoreIC_PushArgs(MacroAssembler* masm) {
312  __ Push(StoreDescriptor::ReceiverRegister(), StoreDescriptor::NameRegister(),
313          StoreDescriptor::ValueRegister(),
314          VectorStoreICDescriptor::SlotRegister(),
315          VectorStoreICDescriptor::VectorRegister());
316}
317
318void NamedStoreHandlerCompiler::GenerateSlow(MacroAssembler* masm) {
319  StoreIC_PushArgs(masm);
320
321  // The slow case calls into the runtime to complete the store without causing
322  // an IC miss that would otherwise cause a transition to the generic stub.
323  __ TailCallRuntime(Runtime::kStoreIC_Slow);
324}
325
326void ElementHandlerCompiler::GenerateStoreSlow(MacroAssembler* masm) {
327  StoreIC_PushArgs(masm);
328
329  // The slow case calls into the runtime to complete the store without causing
330  // an IC miss that would otherwise cause a transition to the generic stub.
331  __ TailCallRuntime(Runtime::kKeyedStoreIC_Slow);
332}
333
334#undef __
335#define __ ACCESS_MASM(masm())
336
337void NamedStoreHandlerCompiler::GenerateRestoreName(Label* label,
338                                                    Handle<Name> name) {
339  if (!label->is_unused()) {
340    __ bind(label);
341    __ mov(this->name(), Operand(name));
342  }
343}
344
345void NamedStoreHandlerCompiler::GenerateRestoreName(Handle<Name> name) {
346  __ mov(this->name(), Operand(name));
347}
348
349void NamedStoreHandlerCompiler::RearrangeVectorAndSlot(
350    Register current_map, Register destination_map) {
351  DCHECK(false);  // Not implemented.
352}
353
354void NamedStoreHandlerCompiler::GenerateRestoreMap(Handle<Map> transition,
355                                                   Register map_reg,
356                                                   Register scratch,
357                                                   Label* miss) {
358  Handle<WeakCell> cell = Map::WeakCellForMap(transition);
359  DCHECK(!map_reg.is(scratch));
360  __ LoadWeakValue(map_reg, cell, miss);
361  if (transition->CanBeDeprecated()) {
362    __ LoadlW(scratch, FieldMemOperand(map_reg, Map::kBitField3Offset));
363    __ DecodeField<Map::Deprecated>(r0, scratch);
364    __ bne(miss);
365  }
366}
367
368void NamedStoreHandlerCompiler::GenerateConstantCheck(Register map_reg,
369                                                      int descriptor,
370                                                      Register value_reg,
371                                                      Register scratch,
372                                                      Label* miss_label) {
373  DCHECK(!map_reg.is(scratch));
374  DCHECK(!map_reg.is(value_reg));
375  DCHECK(!value_reg.is(scratch));
376  __ LoadInstanceDescriptors(map_reg, scratch);
377  __ CmpP(value_reg, FieldMemOperand(
378                         scratch, DescriptorArray::GetValueOffset(descriptor)));
379  __ bne(miss_label);
380}
381
382void NamedStoreHandlerCompiler::GenerateFieldTypeChecks(FieldType* field_type,
383                                                        Register value_reg,
384                                                        Label* miss_label) {
385  Register map_reg = scratch1();
386  Register scratch = scratch2();
387  DCHECK(!value_reg.is(map_reg));
388  DCHECK(!value_reg.is(scratch));
389  __ JumpIfSmi(value_reg, miss_label);
390  if (field_type->IsClass()) {
391    __ LoadP(map_reg, FieldMemOperand(value_reg, HeapObject::kMapOffset));
392    __ CmpWeakValue(map_reg, Map::WeakCellForMap(field_type->AsClass()),
393                    scratch);
394    __ bne(miss_label);
395  }
396}
397
398Register PropertyHandlerCompiler::CheckPrototypes(
399    Register object_reg, Register holder_reg, Register scratch1,
400    Register scratch2, Handle<Name> name, Label* miss, PrototypeCheckType check,
401    ReturnHolder return_what) {
402  Handle<Map> receiver_map = map();
403
404  // Make sure there's no overlap between holder and object registers.
405  DCHECK(!scratch1.is(object_reg) && !scratch1.is(holder_reg));
406  DCHECK(!scratch2.is(object_reg) && !scratch2.is(holder_reg) &&
407         !scratch2.is(scratch1));
408
409  if (FLAG_eliminate_prototype_chain_checks) {
410    Handle<Cell> validity_cell =
411        Map::GetOrCreatePrototypeChainValidityCell(receiver_map, isolate());
412    if (!validity_cell.is_null()) {
413      DCHECK_EQ(Smi::FromInt(Map::kPrototypeChainValid),
414                validity_cell->value());
415      __ mov(scratch1, Operand(validity_cell));
416      __ LoadP(scratch1, FieldMemOperand(scratch1, Cell::kValueOffset));
417      __ CmpSmiLiteral(scratch1, Smi::FromInt(Map::kPrototypeChainValid), r0);
418      __ bne(miss);
419    }
420
421    // The prototype chain of primitives (and their JSValue wrappers) depends
422    // on the native context, which can't be guarded by validity cells.
423    // |object_reg| holds the native context specific prototype in this case;
424    // we need to check its map.
425    if (check == CHECK_ALL_MAPS) {
426      __ LoadP(scratch1, FieldMemOperand(object_reg, HeapObject::kMapOffset));
427      Handle<WeakCell> cell = Map::WeakCellForMap(receiver_map);
428      __ CmpWeakValue(scratch1, cell, scratch2);
429      __ b(ne, miss);
430    }
431  }
432
433  // Keep track of the current object in register reg.
434  Register reg = object_reg;
435  int depth = 0;
436
437  Handle<JSObject> current = Handle<JSObject>::null();
438  if (receiver_map->IsJSGlobalObjectMap()) {
439    current = isolate()->global_object();
440  }
441  // Check access rights to the global object.  This has to happen after
442  // the map check so that we know that the object is actually a global
443  // object.
444  // This allows us to install generated handlers for accesses to the
445  // global proxy (as opposed to using slow ICs). See corresponding code
446  // in LookupForRead().
447  if (receiver_map->IsJSGlobalProxyMap()) {
448    __ CheckAccessGlobalProxy(reg, scratch2, miss);
449  }
450
451  Handle<JSObject> prototype = Handle<JSObject>::null();
452  Handle<Map> current_map = receiver_map;
453  Handle<Map> holder_map(holder()->map());
454  // Traverse the prototype chain and check the maps in the prototype chain for
455  // fast and global objects or do negative lookup for normal objects.
456  while (!current_map.is_identical_to(holder_map)) {
457    ++depth;
458
459    // Only global objects and objects that do not require access
460    // checks are allowed in stubs.
461    DCHECK(current_map->IsJSGlobalProxyMap() ||
462           !current_map->is_access_check_needed());
463
464    prototype = handle(JSObject::cast(current_map->prototype()));
465    if (current_map->is_dictionary_map() &&
466        !current_map->IsJSGlobalObjectMap()) {
467      DCHECK(!current_map->IsJSGlobalProxyMap());  // Proxy maps are fast.
468      if (!name->IsUniqueName()) {
469        DCHECK(name->IsString());
470        name = factory()->InternalizeString(Handle<String>::cast(name));
471      }
472      DCHECK(current.is_null() ||
473             current->property_dictionary()->FindEntry(name) ==
474                 NameDictionary::kNotFound);
475
476      if (FLAG_eliminate_prototype_chain_checks && depth > 1) {
477        // TODO(jkummerow): Cache and re-use weak cell.
478        __ LoadWeakValue(reg, isolate()->factory()->NewWeakCell(current), miss);
479      }
480      GenerateDictionaryNegativeLookup(masm(), miss, reg, name, scratch1,
481                                       scratch2);
482      if (!FLAG_eliminate_prototype_chain_checks) {
483        __ LoadP(scratch1, FieldMemOperand(reg, HeapObject::kMapOffset));
484        __ LoadP(holder_reg, FieldMemOperand(scratch1, Map::kPrototypeOffset));
485      }
486    } else {
487      Register map_reg = scratch1;
488      if (!FLAG_eliminate_prototype_chain_checks) {
489        __ LoadP(map_reg, FieldMemOperand(reg, HeapObject::kMapOffset));
490      }
491      if (current_map->IsJSGlobalObjectMap()) {
492        GenerateCheckPropertyCell(masm(), Handle<JSGlobalObject>::cast(current),
493                                  name, scratch2, miss);
494      } else if (!FLAG_eliminate_prototype_chain_checks &&
495                 (depth != 1 || check == CHECK_ALL_MAPS)) {
496        Handle<WeakCell> cell = Map::WeakCellForMap(current_map);
497        __ CmpWeakValue(map_reg, cell, scratch2);
498        __ bne(miss);
499      }
500      if (!FLAG_eliminate_prototype_chain_checks) {
501        __ LoadP(holder_reg, FieldMemOperand(map_reg, Map::kPrototypeOffset));
502      }
503    }
504
505    reg = holder_reg;  // From now on the object will be in holder_reg.
506    // Go to the next object in the prototype chain.
507    current = prototype;
508    current_map = handle(current->map());
509  }
510
511  DCHECK(!current_map->IsJSGlobalProxyMap());
512
513  // Log the check depth.
514  LOG(isolate(), IntEvent("check-maps-depth", depth + 1));
515
516  if (!FLAG_eliminate_prototype_chain_checks &&
517      (depth != 0 || check == CHECK_ALL_MAPS)) {
518    // Check the holder map.
519    __ LoadP(scratch1, FieldMemOperand(reg, HeapObject::kMapOffset));
520    Handle<WeakCell> cell = Map::WeakCellForMap(current_map);
521    __ CmpWeakValue(scratch1, cell, scratch2);
522    __ bne(miss);
523  }
524
525  bool return_holder = return_what == RETURN_HOLDER;
526  if (FLAG_eliminate_prototype_chain_checks && return_holder && depth != 0) {
527    __ LoadWeakValue(reg, isolate()->factory()->NewWeakCell(current), miss);
528  }
529
530  // Return the register containing the holder.
531  return return_holder ? reg : no_reg;
532}
533
534void NamedLoadHandlerCompiler::FrontendFooter(Handle<Name> name, Label* miss) {
535  if (!miss->is_unused()) {
536    Label success;
537    __ b(&success);
538    __ bind(miss);
539    if (IC::ICUseVector(kind())) {
540      DCHECK(kind() == Code::LOAD_IC);
541      PopVectorAndSlot();
542    }
543    TailCallBuiltin(masm(), MissBuiltin(kind()));
544    __ bind(&success);
545  }
546}
547
548void NamedStoreHandlerCompiler::FrontendFooter(Handle<Name> name, Label* miss) {
549  if (!miss->is_unused()) {
550    Label success;
551    __ b(&success);
552    GenerateRestoreName(miss, name);
553    if (IC::ICUseVector(kind())) PopVectorAndSlot();
554    TailCallBuiltin(masm(), MissBuiltin(kind()));
555    __ bind(&success);
556  }
557}
558
559void NamedLoadHandlerCompiler::GenerateLoadConstant(Handle<Object> value) {
560  // Return the constant value.
561  __ Move(r2, value);
562  __ Ret();
563}
564
565void NamedLoadHandlerCompiler::GenerateLoadInterceptorWithFollowup(
566    LookupIterator* it, Register holder_reg) {
567  DCHECK(holder()->HasNamedInterceptor());
568  DCHECK(!holder()->GetNamedInterceptor()->getter()->IsUndefined());
569
570  // Compile the interceptor call, followed by inline code to load the
571  // property from further up the prototype chain if the call fails.
572  // Check that the maps haven't changed.
573  DCHECK(holder_reg.is(receiver()) || holder_reg.is(scratch1()));
574
575  // Preserve the receiver register explicitly whenever it is different from the
576  // holder and it is needed should the interceptor return without any result.
577  // The ACCESSOR case needs the receiver to be passed into C++ code, the FIELD
578  // case might cause a miss during the prototype check.
579  bool must_perform_prototype_check =
580      !holder().is_identical_to(it->GetHolder<JSObject>());
581  bool must_preserve_receiver_reg =
582      !receiver().is(holder_reg) &&
583      (it->state() == LookupIterator::ACCESSOR || must_perform_prototype_check);
584
585  // Save necessary data before invoking an interceptor.
586  // Requires a frame to make GC aware of pushed pointers.
587  {
588    FrameScope frame_scope(masm(), StackFrame::INTERNAL);
589    if (must_preserve_receiver_reg) {
590      __ Push(receiver(), holder_reg, this->name());
591    } else {
592      __ Push(holder_reg, this->name());
593    }
594    InterceptorVectorSlotPush(holder_reg);
595    // Invoke an interceptor.  Note: map checks from receiver to
596    // interceptor's holder has been compiled before (see a caller
597    // of this method.)
598    CompileCallLoadPropertyWithInterceptor(
599        masm(), receiver(), holder_reg, this->name(), holder(),
600        Runtime::kLoadPropertyWithInterceptorOnly);
601
602    // Check if interceptor provided a value for property.  If it's
603    // the case, return immediately.
604    Label interceptor_failed;
605    __ CompareRoot(r2, Heap::kNoInterceptorResultSentinelRootIndex);
606    __ beq(&interceptor_failed, Label::kNear);
607    frame_scope.GenerateLeaveFrame();
608    __ Ret();
609
610    __ bind(&interceptor_failed);
611    InterceptorVectorSlotPop(holder_reg);
612    __ Pop(this->name());
613    __ Pop(holder_reg);
614    if (must_preserve_receiver_reg) {
615      __ Pop(receiver());
616    }
617    // Leave the internal frame.
618  }
619
620  GenerateLoadPostInterceptor(it, holder_reg);
621}
622
623void NamedLoadHandlerCompiler::GenerateLoadInterceptor(Register holder_reg) {
624  // Call the runtime system to load the interceptor.
625  DCHECK(holder()->HasNamedInterceptor());
626  DCHECK(!holder()->GetNamedInterceptor()->getter()->IsUndefined());
627  PushInterceptorArguments(masm(), receiver(), holder_reg, this->name(),
628                           holder());
629
630  __ TailCallRuntime(Runtime::kLoadPropertyWithInterceptor);
631}
632
633Handle<Code> NamedStoreHandlerCompiler::CompileStoreCallback(
634    Handle<JSObject> object, Handle<Name> name, Handle<AccessorInfo> callback,
635    LanguageMode language_mode) {
636  Register holder_reg = Frontend(name);
637
638  __ Push(receiver(), holder_reg);  // receiver
639
640  // If the callback cannot leak, then push the callback directly,
641  // otherwise wrap it in a weak cell.
642  if (callback->data()->IsUndefined() || callback->data()->IsSmi()) {
643    __ mov(ip, Operand(callback));
644  } else {
645    Handle<WeakCell> cell = isolate()->factory()->NewWeakCell(callback);
646    __ mov(ip, Operand(cell));
647  }
648  __ Push(ip);
649  __ mov(ip, Operand(name));
650  __ Push(ip, value());
651  __ Push(Smi::FromInt(language_mode));
652
653  // Do tail-call to the runtime system.
654  __ TailCallRuntime(Runtime::kStoreCallbackProperty);
655
656  // Return the generated code.
657  return GetCode(kind(), name);
658}
659
660Register NamedStoreHandlerCompiler::value() {
661  return StoreDescriptor::ValueRegister();
662}
663
664Handle<Code> NamedLoadHandlerCompiler::CompileLoadGlobal(
665    Handle<PropertyCell> cell, Handle<Name> name, bool is_configurable) {
666  Label miss;
667  if (IC::ICUseVector(kind())) {
668    PushVectorAndSlot();
669  }
670  FrontendHeader(receiver(), name, &miss, DONT_RETURN_ANYTHING);
671
672  // Get the value from the cell.
673  Register result = StoreDescriptor::ValueRegister();
674  Handle<WeakCell> weak_cell = factory()->NewWeakCell(cell);
675  __ LoadWeakValue(result, weak_cell, &miss);
676  __ LoadP(result, FieldMemOperand(result, PropertyCell::kValueOffset));
677
678  // Check for deleted property if property can actually be deleted.
679  if (is_configurable) {
680    __ CompareRoot(result, Heap::kTheHoleValueRootIndex);
681    __ beq(&miss);
682  }
683
684  Counters* counters = isolate()->counters();
685  __ IncrementCounter(counters->ic_named_load_global_stub(), 1, r3, r5);
686  if (IC::ICUseVector(kind())) {
687    DiscardVectorAndSlot();
688  }
689  __ Ret();
690
691  FrontendFooter(name, &miss);
692
693  // Return the generated code.
694  return GetCode(kind(), name);
695}
696
697#undef __
698}  // namespace internal
699}  // namespace v8
700
701#endif  // V8_TARGET_ARCH_ARM
702