[ic] Delete old KeyedLoadIC code

src/ic/x87/ic-x87.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #if V8_TARGET_ARCH_X87
 
 #include "src/codegen.h"
 #include "src/ic/ic.h"
 #include "src/ic/ic-compiler.h"
 #include "src/ic/stub-cache.h"
 
 namespace v8 {
 namespace internal {
 
 // ----------------------------------------------------------------------------
 // Static IC stub generators.
 //
 
 #define __ ACCESS_MASM(masm)
 
-
-static void GenerateGlobalInstanceTypeCheck(MacroAssembler* masm, Register type,
-                                            Label* global_object) {
-  // Register usage:
-  //   type: holds the receiver instance type on entry.
-  __ cmp(type, JS_GLOBAL_OBJECT_TYPE);
-  __ j(equal, global_object);
-  __ cmp(type, JS_GLOBAL_PROXY_TYPE);
-  __ j(equal, global_object);
-}
-
-
 // Helper function used to load a property from a dictionary backing
 // storage. This function may fail to load a property even though it is
 // in the dictionary, so code at miss_label must always call a backup
 // property load that is complete. This function is safe to call if
 // name is not internalized, and will jump to the miss_label in that
 // case. The generated code assumes that the receiver has slow
 // properties, is not a global object and does not have interceptors.
 static void GenerateDictionaryLoad(MacroAssembler* masm, Label* miss_label,
                                    Register elements, Register name,
                                    Register r0, Register r1, Register result) {
@@ skipping 82 matching lines @@
   // Store the value at the masked, scaled index.
   const int kValueOffset = kElementsStartOffset + kPointerSize;
   __ lea(r0, Operand(elements, r0, times_4, kValueOffset - kHeapObjectTag));
   __ mov(Operand(r0, 0), value);
 
   // Update write barrier. Make sure not to clobber the value.
   __ mov(r1, value);
   __ RecordWrite(elements, r0, r1, kDontSaveFPRegs);
 }
 
-
-// Checks the receiver for special cases (value type, slow case bits).
-// Falls through for regular JS object.
-static void GenerateKeyedLoadReceiverCheck(MacroAssembler* masm,
-                                           Register receiver, Register map,
-                                           int interceptor_bit, Label* slow) {
-  // Register use:
-  //   receiver - holds the receiver and is unchanged.
-  // Scratch registers:
-  //   map - used to hold the map of the receiver.
-
-  // Check that the object isn't a smi.
-  __ JumpIfSmi(receiver, slow);
-
-  // Get the map of the receiver.
-  __ mov(map, FieldOperand(receiver, HeapObject::kMapOffset));
-
-  // Check bit field.
-  __ test_b(
-      FieldOperand(map, Map::kBitFieldOffset),
-      Immediate((1 << Map::kIsAccessCheckNeeded) | (1 << interceptor_bit)));
-  __ j(not_zero, slow);
-  // Check that the object is some kind of JS object EXCEPT JS Value type. In
-  // the case that the object is a value-wrapper object, we enter the runtime
-  // system to make sure that indexing into string objects works as intended.
-  DCHECK(JS_OBJECT_TYPE > JS_VALUE_TYPE);
-
-  __ CmpInstanceType(map, JS_OBJECT_TYPE);
-  __ j(below, slow);
-}
-
-
-// Loads an indexed element from a fast case array.
-static void GenerateFastArrayLoad(MacroAssembler* masm, Register receiver,
-                                  Register key, Register scratch,
-                                  Register scratch2, Register result,
-                                  Label* slow) {
-  // Register use:
-  //   receiver - holds the receiver and is unchanged.
-  //   key - holds the key and is unchanged (must be a smi).
-  // Scratch registers:
-  //   scratch - used to hold elements of the receiver and the loaded value.
-  //   scratch2 - holds maps and prototypes during prototype chain check.
-  //   result - holds the result on exit if the load succeeds and
-  //            we fall through.
-  Label check_prototypes, check_next_prototype;
-  Label done, in_bounds, absent;
-
-  __ mov(scratch, FieldOperand(receiver, JSObject::kElementsOffset));
-  __ AssertFastElements(scratch);
-
-  // Check that the key (index) is within bounds.
-  __ cmp(key, FieldOperand(scratch, FixedArray::kLengthOffset));
-  __ j(below, &in_bounds);
-  // Out-of-bounds. Check the prototype chain to see if we can just return
-  // 'undefined'.
-  __ cmp(key, 0);
-  __ j(less, slow);  // Negative keys can't take the fast OOB path.
-  __ bind(&check_prototypes);
-  __ mov(scratch2, FieldOperand(receiver, HeapObject::kMapOffset));
-  __ bind(&check_next_prototype);
-  __ mov(scratch2, FieldOperand(scratch2, Map::kPrototypeOffset));
-  // scratch2: current prototype
-  __ cmp(scratch2, masm->isolate()->factory()->null_value());
-  __ j(equal, &absent);
-  __ mov(scratch, FieldOperand(scratch2, JSObject::kElementsOffset));
-  __ mov(scratch2, FieldOperand(scratch2, HeapObject::kMapOffset));
-  // scratch: elements of current prototype
-  // scratch2: map of current prototype
-  __ CmpInstanceType(scratch2, JS_OBJECT_TYPE);
-  __ j(below, slow);
-  __ test_b(FieldOperand(scratch2, Map::kBitFieldOffset),
-            Immediate((1 << Map::kIsAccessCheckNeeded) |
-                      (1 << Map::kHasIndexedInterceptor)));
-  __ j(not_zero, slow);
-  __ cmp(scratch, masm->isolate()->factory()->empty_fixed_array());
-  __ j(not_equal, slow);
-  __ jmp(&check_next_prototype);
-
-  __ bind(&absent);
-  __ mov(result, masm->isolate()->factory()->undefined_value());
-  __ jmp(&done);
-
-  __ bind(&in_bounds);
-  // Fast case: Do the load.
-  STATIC_ASSERT((kPointerSize == 4) && (kSmiTagSize == 1) && (kSmiTag == 0));
-  __ mov(scratch, FieldOperand(scratch, key, times_2, FixedArray::kHeaderSize));
-  __ cmp(scratch, Immediate(masm->isolate()->factory()->the_hole_value()));
-  // In case the loaded value is the_hole we have to check the prototype chain.
-  __ j(equal, &check_prototypes);
-  __ Move(result, scratch);
-  __ bind(&done);
-}
-
-
-// Checks whether a key is an array index string or a unique name.
-// Falls through if the key is a unique name.
-static void GenerateKeyNameCheck(MacroAssembler* masm, Register key,
-                                 Register map, Register hash,
-                                 Label* index_string, Label* not_unique) {
-  // Register use:
-  //   key - holds the key and is unchanged. Assumed to be non-smi.
-  // Scratch registers:
-  //   map - used to hold the map of the key.
-  //   hash - used to hold the hash of the key.
-  Label unique;
-  __ CmpObjectType(key, LAST_UNIQUE_NAME_TYPE, map);
-  __ j(above, not_unique);
-  STATIC_ASSERT(LAST_UNIQUE_NAME_TYPE == FIRST_NONSTRING_TYPE);
-  __ j(equal, &unique);
-
-  // Is the string an array index, with cached numeric value?
-  __ mov(hash, FieldOperand(key, Name::kHashFieldOffset));
-  __ test(hash, Immediate(Name::kContainsCachedArrayIndexMask));
-  __ j(zero, index_string);
-
-  // Is the string internalized? We already know it's a string so a single
-  // bit test is enough.
-  STATIC_ASSERT(kNotInternalizedTag != 0);
-  __ test_b(FieldOperand(map, Map::kInstanceTypeOffset),
-            Immediate(kIsNotInternalizedMask));
-  __ j(not_zero, not_unique);
-
-  __ bind(&unique);
-}
-
-void KeyedLoadIC::GenerateMegamorphic(MacroAssembler* masm) {
-  // The return address is on the stack.
-  Label slow, check_name, index_smi, index_name, property_array_property;
-  Label probe_dictionary, check_number_dictionary;
-
-  Register receiver = LoadDescriptor::ReceiverRegister();
-  Register key = LoadDescriptor::NameRegister();
-  DCHECK(receiver.is(edx));
-  DCHECK(key.is(ecx));
-
-  // Check that the key is a smi.
-  __ JumpIfNotSmi(key, &check_name);
-  __ bind(&index_smi);
-  // Now the key is known to be a smi. This place is also jumped to from
-  // where a numeric string is converted to a smi.
-
-  GenerateKeyedLoadReceiverCheck(masm, receiver, eax,
-                                 Map::kHasIndexedInterceptor, &slow);
-
-  // Check the receiver's map to see if it has fast elements.
-  __ CheckFastElements(eax, &check_number_dictionary);
-
-  GenerateFastArrayLoad(masm, receiver, key, eax, ebx, eax, &slow);
-  Isolate* isolate = masm->isolate();
-  Counters* counters = isolate->counters();
-  __ IncrementCounter(counters->ic_keyed_load_generic_smi(), 1);
-  __ ret(0);
-
-  __ bind(&check_number_dictionary);
-  __ mov(ebx, key);
-  __ SmiUntag(ebx);
-  __ mov(eax, FieldOperand(receiver, JSObject::kElementsOffset));
-
-  // Check whether the elements is a number dictionary.
-  // ebx: untagged index
-  // eax: elements
-  __ CheckMap(eax, isolate->factory()->hash_table_map(), &slow,
-              DONT_DO_SMI_CHECK);
-  Label slow_pop_receiver;
-  // Push receiver on the stack to free up a register for the dictionary
-  // probing.
-  __ push(receiver);
-  __ LoadFromNumberDictionary(&slow_pop_receiver, eax, key, ebx, edx, edi, eax);
-  // Pop receiver before returning.
-  __ pop(receiver);
-  __ ret(0);
-
-  __ bind(&slow_pop_receiver);
-  // Pop the receiver from the stack and jump to runtime.
-  __ pop(receiver);
-
-  __ bind(&slow);
-  // Slow case: jump to runtime.
-  __ IncrementCounter(counters->ic_keyed_load_generic_slow(), 1);
-  GenerateRuntimeGetProperty(masm);
-
-  __ bind(&check_name);
-  GenerateKeyNameCheck(masm, key, eax, ebx, &index_name, &slow);
-
-  GenerateKeyedLoadReceiverCheck(masm, receiver, eax, Map::kHasNamedInterceptor,
-                                 &slow);
-
-  // If the receiver is a fast-case object, check the stub cache. Otherwise
-  // probe the dictionary.
-  __ mov(ebx, FieldOperand(receiver, JSObject::kPropertiesOffset));
-  __ cmp(FieldOperand(ebx, HeapObject::kMapOffset),
-         Immediate(isolate->factory()->hash_table_map()));
-  __ j(equal, &probe_dictionary);
-
-  // The handlers in the stub cache expect a vector and slot. Since we won't
-  // change the IC from any downstream misses, a dummy vector can be used.
-  Handle<TypeFeedbackVector> dummy_vector =
-      TypeFeedbackVector::DummyVector(isolate);
-  int slot = dummy_vector->GetIndex(
-      FeedbackVectorSlot(TypeFeedbackVector::kDummyKeyedLoadICSlot));
-  __ push(Immediate(Smi::FromInt(slot)));
-  __ push(Immediate(dummy_vector));
-
-  masm->isolate()->load_stub_cache()->GenerateProbe(masm, receiver, key, ebx,
-                                                    edi);
-
-  __ pop(LoadWithVectorDescriptor::VectorRegister());
-  __ pop(LoadDescriptor::SlotRegister());
-
-  // Cache miss.
-  GenerateMiss(masm);
-
-  // Do a quick inline probe of the receiver's dictionary, if it
-  // exists.
-  __ bind(&probe_dictionary);
-
-  __ mov(eax, FieldOperand(receiver, JSObject::kMapOffset));
-  __ movzx_b(eax, FieldOperand(eax, Map::kInstanceTypeOffset));
-  GenerateGlobalInstanceTypeCheck(masm, eax, &slow);
-
-  GenerateDictionaryLoad(masm, &slow, ebx, key, eax, edi, eax);
-  __ IncrementCounter(counters->ic_keyed_load_generic_symbol(), 1);
-  __ ret(0);
-
-  __ bind(&index_name);
-  __ IndexFromHash(ebx, key);
-  // Now jump to the place where smi keys are handled.
-  __ jmp(&index_smi);
-}
-
-
 static void KeyedStoreGenerateMegamorphicHelper(
     MacroAssembler* masm, Label* fast_object, Label* fast_double, Label* slow,
     KeyedStoreCheckMap check_map, KeyedStoreIncrementLength increment_length) {
   Label transition_smi_elements;
   Label finish_object_store, non_double_value, transition_double_elements;
   Label fast_double_without_map_check;
   Register receiver = StoreDescriptor::ReceiverRegister();
   Register key = StoreDescriptor::NameRegister();
   Register value = StoreDescriptor::ValueRegister();
   DCHECK(receiver.is(edx));
@@ skipping 466 matching lines @@
   Condition cc =
       (check == ENABLE_INLINED_SMI_CHECK)
           ? (*jmp_address == Assembler::kJncShortOpcode ? not_zero : zero)
           : (*jmp_address == Assembler::kJnzShortOpcode ? not_carry : carry);
   *jmp_address = static_cast<byte>(Assembler::kJccShortPrefix | cc);
 }
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X87