[cleanup] Drop handwritten KeyedStoreIC code

src/ic/arm/ic-arm.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_ARM
 
 #include "src/codegen.h"
 #include "src/ic/ic.h"
 #include "src/ic/ic-compiler.h"
 #include "src/ic/stub-cache.h"
@@ skipping 201 matching lines @@
 }
 
 void KeyedStoreIC::GenerateSlow(MacroAssembler* masm) {
   StoreIC_PushArgs(masm);
 
   // The slow case calls into the runtime to complete the store without causing
   // an IC miss that would otherwise cause a transition to the generic stub.
   __ TailCallRuntime(Runtime::kKeyedStoreIC_Slow);
 }
 
-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 = r4;
-  Register address = r5;
-  DCHECK(!AreAliased(value, key, receiver, receiver_map, elements_map, elements,
-                     scratch, address));
-
-  if (check_map == kCheckMap) {
-    __ ldr(elements_map, FieldMemOperand(elements, HeapObject::kMapOffset));
-    __ cmp(elements_map,
-           Operand(masm->isolate()->factory()->fixed_array_map()));
-    __ b(ne, fast_double);
-  }
-
-  // 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;
-  __ add(address, elements, Operand(FixedArray::kHeaderSize - kHeapObjectTag));
-  __ ldr(scratch, MemOperand::PointerAddressFromSmiKey(address, key, PreIndex));
-  __ cmp(scratch, Operand(masm->isolate()->factory()->the_hole_value()));
-  __ b(ne, &holecheck_passed1);
-  __ 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.
-    __ add(scratch, key, Operand(Smi::FromInt(1)));
-    __ str(scratch, FieldMemOperand(receiver, JSArray::kLengthOffset));
-  }
-  // It's irrelevant whether array is smi-only or not when writing a smi.
-  __ add(address, elements, Operand(FixedArray::kHeaderSize - kHeapObjectTag));
-  __ str(value, MemOperand::PointerAddressFromSmiKey(address, key));
-  __ Ret();
-
-  __ 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.
-    __ add(scratch, key, Operand(Smi::FromInt(1)));
-    __ str(scratch, FieldMemOperand(receiver, JSArray::kLengthOffset));
-  }
-  __ add(address, elements, Operand(FixedArray::kHeaderSize - kHeapObjectTag));
-  __ add(address, address, Operand::PointerOffsetFromSmiKey(key));
-  __ str(value, MemOperand(address));
-  // Update write barrier for the elements array address.
-  __ mov(scratch, value);  // Preserve the value which is returned.
-  __ RecordWrite(elements, address, scratch, kLRHasNotBeenSaved,
-                 kDontSaveFPRegs, EMIT_REMEMBERED_SET, OMIT_SMI_CHECK);
-  __ Ret();
-
-  __ bind(fast_double);
-  if (check_map == kCheckMap) {
-    // Check for fast double array case. If this fails, call through to the
-    // runtime.
-    __ CompareRoot(elements_map, Heap::kFixedDoubleArrayMapRootIndex);
-    __ b(ne, slow);
-  }
-
-  // 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.
-  __ add(address, elements,
-         Operand((FixedDoubleArray::kHeaderSize + sizeof(kHoleNanLower32)) -
-                 kHeapObjectTag));
-  __ ldr(scratch, MemOperand(address, key, LSL, kPointerSizeLog2, PreIndex));
-  __ cmp(scratch, Operand(kHoleNanUpper32));
-  __ b(ne, &fast_double_without_map_check);
-  __ JumpIfDictionaryInPrototypeChain(receiver, elements_map, scratch, slow);
-
-  __ bind(&fast_double_without_map_check);
-  __ StoreNumberToDoubleElements(value, key, elements, scratch, d0,
-                                 &transition_double_elements);
-  if (increment_length == kIncrementLength) {
-    // Add 1 to receiver->length.
-    __ add(scratch, key, Operand(Smi::FromInt(1)));
-    __ str(scratch, FieldMemOperand(receiver, JSArray::kLengthOffset));
-  }
-  __ Ret();
-
-  __ bind(&transition_smi_elements);
-  // Transition the array appropriately depending on the value type.
-  __ ldr(scratch, FieldMemOperand(value, HeapObject::kMapOffset));
-  __ CompareRoot(scratch, Heap::kHeapNumberMapRootIndex);
-  __ b(ne, &non_double_value);
-
-  // 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);
-  __ ldr(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);
-  __ ldr(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);
-  __ ldr(elements, FieldMemOperand(receiver, JSObject::kElementsOffset));
-  __ jmp(&finish_object_store);
-}
-
-
-void KeyedStoreIC::GenerateMegamorphic(MacroAssembler* masm,
-                                       LanguageMode language_mode) {
-  // ---------- S t a t e --------------
-  //  -- r0     : value
-  //  -- r1     : key
-  //  -- r2     : receiver
-  //  -- lr     : 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(receiver.is(r1));
-  DCHECK(key.is(r2));
-  DCHECK(value.is(r0));
-  Register receiver_map = r3;
-  Register elements_map = r6;
-  Register elements = r9;  // Elements array of the receiver.
-  // r4 and r5 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.
-  __ ldr(receiver_map, FieldMemOperand(receiver, HeapObject::kMapOffset));
-  // Check that the receiver does not require access checks.
-  // The generic stub does not perform map checks.
-  __ ldrb(ip, FieldMemOperand(receiver_map, Map::kBitFieldOffset));
-  __ tst(ip, Operand(1 << Map::kIsAccessCheckNeeded));
-  __ b(ne, &slow);
-  // Check if the object is a JS array or not.
-  __ ldrb(r4, FieldMemOperand(receiver_map, Map::kInstanceTypeOffset));
-  __ cmp(r4, Operand(JS_ARRAY_TYPE));
-  __ b(eq, &array);
-  // 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);
-  __ cmp(r4, Operand(JS_OBJECT_TYPE));
-  __ b(lo, &slow);
-
-  // Object case: Check key against length in the elements array.
-  __ ldr(elements, FieldMemOperand(receiver, JSObject::kElementsOffset));
-  // Check array bounds. Both the key and the length of FixedArray are smis.
-  __ ldr(ip, FieldMemOperand(elements, FixedArray::kLengthOffset));
-  __ cmp(key, Operand(ip));
-  __ b(lo, &fast_object);
-
-  // Slow case, handle jump to runtime.
-  __ bind(&slow);
-  // Entry registers are intact.
-  // r0: value.
-  // r1: key.
-  // r2: receiver.
-  PropertyICCompiler::GenerateRuntimeSetProperty(masm, language_mode);
-  // Never returns to here.
-
-  __ bind(&maybe_name_key);
-  __ ldr(r4, FieldMemOperand(key, HeapObject::kMapOffset));
-  __ ldrb(r4, FieldMemOperand(r4, Map::kInstanceTypeOffset));
-  __ JumpIfNotUniqueNameInstanceType(r4, &slow);
-
-  // We use register r8, because otherwise probing the megamorphic stub cache
-  // would require pushing temporaries on the stack.
-  // TODO(mvstanton): quit using register r8 when
-  // FLAG_enable_embedded_constant_pool is turned on.
-  DCHECK(!FLAG_enable_embedded_constant_pool);
-  Register temporary2 = r8;
-  // 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, r5, temporary2, r6, r9));
-  Handle<TypeFeedbackVector> dummy_vector =
-      TypeFeedbackVector::DummyVector(masm->isolate());
-  int slot_index = dummy_vector->GetIndex(
-      FeedbackVectorSlot(TypeFeedbackVector::kDummyKeyedStoreICSlot));
-  __ LoadRoot(vector, Heap::kDummyVectorRootIndex);
-  __ mov(slot, Operand(Smi::FromInt(slot_index)));
-
-  masm->isolate()->store_stub_cache()->GenerateProbe(masm, receiver, key, r5,
-                                                     temporary2, r6, r9);
-  // Cache miss.
-  __ b(&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.
-  __ b(ne, &slow);  // Only support writing to writing to array[array.length].
-  // Check for room in the elements backing store.
-  // Both the key and the length of FixedArray are smis.
-  __ ldr(ip, FieldMemOperand(elements, FixedArray::kLengthOffset));
-  __ cmp(key, Operand(ip));
-  __ b(hs, &slow);
-  __ ldr(elements_map, FieldMemOperand(elements, HeapObject::kMapOffset));
-  __ cmp(elements_map, Operand(masm->isolate()->factory()->fixed_array_map()));
-  __ b(ne, &check_if_double_array);
-  __ jmp(&fast_object_grow);
-
-  __ bind(&check_if_double_array);
-  __ cmp(elements_map,
-         Operand(masm->isolate()->factory()->fixed_double_array_map()));
-  __ b(ne, &slow);
-  __ 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);
-  __ ldr(elements, FieldMemOperand(receiver, JSObject::kElementsOffset));
-
-  // Check the key against the length in the array.
-  __ ldr(ip, FieldMemOperand(receiver, JSArray::kLengthOffset));
-  __ cmp(key, Operand(ip));
-  __ b(hs, &extra);
-
-  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);
-}
-
 void StoreIC::GenerateMiss(MacroAssembler* masm) {
   StoreIC_PushArgs(masm);
 
   // Perform tail call to the entry.
   __ TailCallRuntime(Runtime::kStoreIC_Miss);
 }
 
 
 void StoreIC::GenerateNormal(MacroAssembler* masm) {
   Label miss;
@@ skipping 113 matching lines @@
     patcher.EmitCondition(ne);
   } else {
     DCHECK(Assembler::GetCondition(branch_instr) == ne);
     patcher.EmitCondition(eq);
   }
 }
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM