[cleanup] Drop handwritten KeyedStoreIC code

src/ic/mips/ic-mips.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_MIPS
 
 #include "src/codegen.h"
 #include "src/ic/ic.h"
 #include "src/ic/ic-compiler.h"
 #include "src/ic/stub-cache.h"
@@ skipping 182 matching lines @@
 
 void KeyedLoadIC::GenerateRuntimeGetProperty(MacroAssembler* masm) {
   // The return address is in ra.
 
   __ Push(LoadDescriptor::ReceiverRegister(), LoadDescriptor::NameRegister());
 
   // Do tail-call to runtime routine.
   __ TailCallRuntime(Runtime::kKeyedGetProperty);
 }
 
-static void KeyedStoreGenerateMegamorphicHelper(
-    MacroAssembler* masm, Label* fast_object, Label* fast_double, Label* slow,
-    KeyedStoreCheckMap check_map, KeyedStoreIncrementLength increment_length,
-    Register value, Register key, Register receiver, Register receiver_map,
-    Register elements_map, Register elements) {
-  Label transition_smi_elements;
-  Label finish_object_store, non_double_value, transition_double_elements;
-  Label fast_double_without_map_check;
-
-  // Fast case: Do the store, could be either Object or double.
-  __ bind(fast_object);
-  Register scratch = t0;
-  Register scratch2 = t4;
-  Register scratch3 = t5;
-  Register address = t1;
-  DCHECK(!AreAliased(value, key, receiver, receiver_map, elements_map, elements,
-                     scratch, scratch2, scratch3, address));
-
-  if (check_map == kCheckMap) {
-    __ lw(elements_map, FieldMemOperand(elements, HeapObject::kMapOffset));
-    __ Branch(fast_double, ne, elements_map,
-              Operand(masm->isolate()->factory()->fixed_array_map()));
-  }
-
-  // HOLECHECK: guards "A[i] = V"
-  // We have to go to the runtime if the current value is the hole because
-  // there may be a callback on the element.
-  Label holecheck_passed1;
-  __ Addu(address, elements, FixedArray::kHeaderSize - kHeapObjectTag);
-  __ Lsa(address, address, key, kPointerSizeLog2 - kSmiTagSize);
-  __ lw(scratch, MemOperand(address));
-  __ Branch(&holecheck_passed1, ne, scratch,
-            Operand(masm->isolate()->factory()->the_hole_value()));
-  __ JumpIfDictionaryInPrototypeChain(receiver, elements_map, scratch, slow);
-
-  __ bind(&holecheck_passed1);
-
-  // Smi stores don't require further checks.
-  Label non_smi_value;
-  __ JumpIfNotSmi(value, &non_smi_value);
-
-  if (increment_length == kIncrementLength) {
-    // Add 1 to receiver->length.
-    __ Addu(scratch, key, Operand(Smi::FromInt(1)));
-    __ sw(scratch, FieldMemOperand(receiver, JSArray::kLengthOffset));
-  }
-  // It's irrelevant whether array is smi-only or not when writing a smi.
-  __ Addu(address, elements, Operand(FixedArray::kHeaderSize - kHeapObjectTag));
-  __ Lsa(address, address, key, kPointerSizeLog2 - kSmiTagSize);
-  __ sw(value, MemOperand(address));
-  __ Ret(USE_DELAY_SLOT);
-  __ Move(v0, value);  // Ensure the stub returns correct value.
-
-  __ bind(&non_smi_value);
-  // Escape to elements kind transition case.
-  __ CheckFastObjectElements(receiver_map, scratch, &transition_smi_elements);
-
-  // Fast elements array, store the value to the elements backing store.
-  __ bind(&finish_object_store);
-  if (increment_length == kIncrementLength) {
-    // Add 1 to receiver->length.
-    __ Addu(scratch, key, Operand(Smi::FromInt(1)));
-    __ sw(scratch, FieldMemOperand(receiver, JSArray::kLengthOffset));
-  }
-  __ Addu(address, elements, Operand(FixedArray::kHeaderSize - kHeapObjectTag));
-  __ Lsa(address, address, key, kPointerSizeLog2 - kSmiTagSize);
-  __ sw(value, MemOperand(address));
-  // Update write barrier for the elements array address.
-  __ mov(scratch, value);  // Preserve the value which is returned.
-  __ RecordWrite(elements, address, scratch, kRAHasNotBeenSaved,
-                 kDontSaveFPRegs, EMIT_REMEMBERED_SET, OMIT_SMI_CHECK);
-  __ Ret(USE_DELAY_SLOT);
-  __ Move(v0, value);  // Ensure the stub returns correct value.
-
-  __ bind(fast_double);
-  if (check_map == kCheckMap) {
-    // Check for fast double array case. If this fails, call through to the
-    // runtime.
-    __ LoadRoot(at, Heap::kFixedDoubleArrayMapRootIndex);
-    __ Branch(slow, ne, elements_map, Operand(at));
-  }
-
-  // HOLECHECK: guards "A[i] double hole?"
-  // We have to see if the double version of the hole is present. If so
-  // go to the runtime.
-  __ Addu(address, elements, Operand(FixedDoubleArray::kHeaderSize +
-                                     kHoleNanUpper32Offset - kHeapObjectTag));
-  __ Lsa(address, address, key, kPointerSizeLog2);
-  __ lw(scratch, MemOperand(address));
-  __ Branch(&fast_double_without_map_check, ne, scratch,
-            Operand(kHoleNanUpper32));
-  __ JumpIfDictionaryInPrototypeChain(receiver, elements_map, scratch, slow);
-
-  __ bind(&fast_double_without_map_check);
-  __ StoreNumberToDoubleElements(value, key, elements, scratch, scratch2,
-                                 scratch3, &transition_double_elements);
-  if (increment_length == kIncrementLength) {
-    // Add 1 to receiver->length.
-    __ Addu(scratch, key, Operand(Smi::FromInt(1)));
-    __ sw(scratch, FieldMemOperand(receiver, JSArray::kLengthOffset));
-  }
-  __ Ret(USE_DELAY_SLOT);
-  __ Move(v0, value);  // Ensure the stub returns correct value.
-
-  __ bind(&transition_smi_elements);
-  // Transition the array appropriately depending on the value type.
-  __ lw(scratch, FieldMemOperand(value, HeapObject::kMapOffset));
-  __ LoadRoot(at, Heap::kHeapNumberMapRootIndex);
-  __ Branch(&non_double_value, ne, scratch, Operand(at));
-
-  // Value is a double. Transition FAST_SMI_ELEMENTS ->
-  // FAST_DOUBLE_ELEMENTS and complete the store.
-  __ LoadTransitionedArrayMapConditional(
-      FAST_SMI_ELEMENTS, FAST_DOUBLE_ELEMENTS, receiver_map, scratch, slow);
-  AllocationSiteMode mode =
-      AllocationSite::GetMode(FAST_SMI_ELEMENTS, FAST_DOUBLE_ELEMENTS);
-  ElementsTransitionGenerator::GenerateSmiToDouble(masm, receiver, key, value,
-                                                   receiver_map, mode, slow);
-  __ lw(elements, FieldMemOperand(receiver, JSObject::kElementsOffset));
-  __ jmp(&fast_double_without_map_check);
-
-  __ bind(&non_double_value);
-  // Value is not a double, FAST_SMI_ELEMENTS -> FAST_ELEMENTS
-  __ LoadTransitionedArrayMapConditional(FAST_SMI_ELEMENTS, FAST_ELEMENTS,
-                                         receiver_map, scratch, slow);
-  mode = AllocationSite::GetMode(FAST_SMI_ELEMENTS, FAST_ELEMENTS);
-  ElementsTransitionGenerator::GenerateMapChangeElementsTransition(
-      masm, receiver, key, value, receiver_map, mode, slow);
-  __ lw(elements, FieldMemOperand(receiver, JSObject::kElementsOffset));
-  __ jmp(&finish_object_store);
-
-  __ bind(&transition_double_elements);
-  // Elements are FAST_DOUBLE_ELEMENTS, but value is an Object that's not a
-  // HeapNumber. Make sure that the receiver is a Array with FAST_ELEMENTS and
-  // transition array from FAST_DOUBLE_ELEMENTS to FAST_ELEMENTS
-  __ LoadTransitionedArrayMapConditional(FAST_DOUBLE_ELEMENTS, FAST_ELEMENTS,
-                                         receiver_map, scratch, slow);
-  mode = AllocationSite::GetMode(FAST_DOUBLE_ELEMENTS, FAST_ELEMENTS);
-  ElementsTransitionGenerator::GenerateDoubleToObject(
-      masm, receiver, key, value, receiver_map, mode, slow);
-  __ lw(elements, FieldMemOperand(receiver, JSObject::kElementsOffset));
-  __ jmp(&finish_object_store);
-}
-
-
-void KeyedStoreIC::GenerateMegamorphic(MacroAssembler* masm,
-                                       LanguageMode language_mode) {
-  // ---------- S t a t e --------------
-  //  -- a0     : value
-  //  -- a1     : key
-  //  -- a2     : receiver
-  //  -- ra     : return address
-  // -----------------------------------
-  Label slow, fast_object, fast_object_grow;
-  Label fast_double, fast_double_grow;
-  Label array, extra, check_if_double_array, maybe_name_key, miss;
-
-  // Register usage.
-  Register value = StoreDescriptor::ValueRegister();
-  Register key = StoreDescriptor::NameRegister();
-  Register receiver = StoreDescriptor::ReceiverRegister();
-  DCHECK(value.is(a0));
-  Register receiver_map = a3;
-  Register elements_map = t2;
-  Register elements = t3;  // Elements array of the receiver.
-  // t0 and t1 are used as general scratch registers.
-
-  // Check that the key is a smi.
-  __ JumpIfNotSmi(key, &maybe_name_key);
-  // Check that the object isn't a smi.
-  __ JumpIfSmi(receiver, &slow);
-  // Get the map of the object.
-  __ lw(receiver_map, FieldMemOperand(receiver, HeapObject::kMapOffset));
-  // Check that the receiver does not require access checks.
-  // The generic stub does not perform map checks.
-  __ lbu(t0, FieldMemOperand(receiver_map, Map::kBitFieldOffset));
-  __ And(t0, t0, Operand(1 << Map::kIsAccessCheckNeeded));
-  __ Branch(&slow, ne, t0, Operand(zero_reg));
-  // Check if the object is a JS array or not.
-  __ lbu(t0, FieldMemOperand(receiver_map, Map::kInstanceTypeOffset));
-  __ Branch(&array, eq, t0, Operand(JS_ARRAY_TYPE));
-  // 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.
-  STATIC_ASSERT(JS_VALUE_TYPE < JS_OBJECT_TYPE);
-  __ Branch(&slow, lo, t0, Operand(JS_OBJECT_TYPE));
-
-  // Object case: Check key against length in the elements array.
-  __ lw(elements, FieldMemOperand(receiver, JSObject::kElementsOffset));
-  // Check array bounds. Both the key and the length of FixedArray are smis.
-  __ lw(t0, FieldMemOperand(elements, FixedArray::kLengthOffset));
-  __ Branch(&fast_object, lo, key, Operand(t0));
-
-  // Slow case, handle jump to runtime.
-  __ bind(&slow);
-  // Entry registers are intact.
-  // a0: value.
-  // a1: key.
-  // a2: receiver.
-  PropertyICCompiler::GenerateRuntimeSetProperty(masm, language_mode);
-  // Never returns to here.
-
-  __ bind(&maybe_name_key);
-  __ lw(t0, FieldMemOperand(key, HeapObject::kMapOffset));
-  __ lb(t0, FieldMemOperand(t0, Map::kInstanceTypeOffset));
-  __ JumpIfNotUniqueNameInstanceType(t0, &slow);
-
-  // 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.
-  Register vector = StoreWithVectorDescriptor::VectorRegister();
-  Register slot = StoreWithVectorDescriptor::SlotRegister();
-  DCHECK(!AreAliased(vector, slot, t1, t2, t4, t5));
-  Handle<TypeFeedbackVector> dummy_vector =
-      TypeFeedbackVector::DummyVector(masm->isolate());
-  int slot_index = dummy_vector->GetIndex(
-      FeedbackVectorSlot(TypeFeedbackVector::kDummyKeyedStoreICSlot));
-  __ LoadRoot(vector, Heap::kDummyVectorRootIndex);
-  __ li(slot, Operand(Smi::FromInt(slot_index)));
-
-  masm->isolate()->store_stub_cache()->GenerateProbe(masm, receiver, key, t1,
-                                                     t2, t4, t5);
-  // Cache miss.
-  __ Branch(&miss);
-
-  // Extra capacity case: Check if there is extra capacity to
-  // perform the store and update the length. Used for adding one
-  // element to the array by writing to array[array.length].
-  __ bind(&extra);
-  // Condition code from comparing key and array length is still available.
-  // Only support writing to array[array.length].
-  __ Branch(&slow, ne, key, Operand(t0));
-  // Check for room in the elements backing store.
-  // Both the key and the length of FixedArray are smis.
-  __ lw(t0, FieldMemOperand(elements, FixedArray::kLengthOffset));
-  __ Branch(&slow, hs, key, Operand(t0));
-  __ lw(elements_map, FieldMemOperand(elements, HeapObject::kMapOffset));
-  __ Branch(&check_if_double_array, ne, elements_map,
-            Heap::kFixedArrayMapRootIndex);
-
-  __ jmp(&fast_object_grow);
-
-  __ bind(&check_if_double_array);
-  __ Branch(&slow, ne, elements_map, Heap::kFixedDoubleArrayMapRootIndex);
-  __ jmp(&fast_double_grow);
-
-  // Array case: Get the length and the elements array from the JS
-  // array. Check that the array is in fast mode (and writable); if it
-  // is the length is always a smi.
-  __ bind(&array);
-  __ lw(elements, FieldMemOperand(receiver, JSObject::kElementsOffset));
-
-  // Check the key against the length in the array.
-  __ lw(t0, FieldMemOperand(receiver, JSArray::kLengthOffset));
-  __ Branch(&extra, hs, key, Operand(t0));
-
-  KeyedStoreGenerateMegamorphicHelper(
-      masm, &fast_object, &fast_double, &slow, kCheckMap, kDontIncrementLength,
-      value, key, receiver, receiver_map, elements_map, elements);
-  KeyedStoreGenerateMegamorphicHelper(masm, &fast_object_grow,
-                                      &fast_double_grow, &slow, kDontCheckMap,
-                                      kIncrementLength, value, key, receiver,
-                                      receiver_map, elements_map, elements);
-
-  __ bind(&miss);
-  GenerateMiss(masm);
-}
-
-
 static void StoreIC_PushArgs(MacroAssembler* masm) {
   __ Push(StoreWithVectorDescriptor::ValueRegister(),
           StoreWithVectorDescriptor::SlotRegister(),
           StoreWithVectorDescriptor::VectorRegister(),
           StoreWithVectorDescriptor::ReceiverRegister(),
           StoreWithVectorDescriptor::NameRegister());
 }
 
 
 void KeyedStoreIC::GenerateMiss(MacroAssembler* masm) {
@@ skipping 167 matching lines @@
       break;
     default:
       UNIMPLEMENTED();
   }
   patcher.ChangeBranchCondition(branch_instr, opcode);
 }
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_MIPS