Add MEGAMORPHIC state support for KeyedStoreIC

src/ic/x64/ic-x64.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.
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_X64
 
 #include "src/codegen.h"
 #include "src/ic/ic.h"
@@ skipping 548 matching lines @@
   __ LoadTransitionedArrayMapConditional(FAST_DOUBLE_ELEMENTS, FAST_ELEMENTS,
                                          rbx, rdi, slow);
   mode = AllocationSite::GetMode(FAST_DOUBLE_ELEMENTS, FAST_ELEMENTS);
   ElementsTransitionGenerator::GenerateDoubleToObject(masm, receiver, key,
                                                       value, rbx, mode, slow);
   __ movp(rbx, FieldOperand(receiver, JSObject::kElementsOffset));
   __ jmp(&finish_object_store);
 }
 
 
-void KeyedStoreIC::GenerateGeneric(MacroAssembler* masm,
-                                   StrictMode strict_mode) {
+void KeyedStoreIC::GenerateGeneric(
+    MacroAssembler* masm, StrictMode strict_mode,
+    KeyedStoreStubCacheRequirement handler_requirement) {
   // Return address is on the stack.
   Label slow, slow_with_tagged_index, fast_object, fast_object_grow;
   Label fast_double, fast_double_grow;
-  Label array, extra, check_if_double_array;
+  Label array, extra, check_if_double_array, maybe_name_key, miss;
   Register receiver = StoreDescriptor::ReceiverRegister();
   Register key = StoreDescriptor::NameRegister();
   DCHECK(receiver.is(rdx));
   DCHECK(key.is(rcx));
 
   // Check that the object isn't a smi.
   __ JumpIfSmi(receiver, &slow_with_tagged_index);
   // Get the map from the receiver.
   __ movp(r9, FieldOperand(receiver, HeapObject::kMapOffset));
   // Check that the receiver does not require access checks and is not observed.
   // The generic stub does not perform map checks or handle observed objects.
   __ testb(FieldOperand(r9, Map::kBitFieldOffset),
            Immediate(1 << Map::kIsAccessCheckNeeded | 1 << Map::kIsObserved));
   __ j(not_zero, &slow_with_tagged_index);
   // Check that the key is a smi.
-  __ JumpIfNotSmi(key, &slow_with_tagged_index);
+  __ JumpIfNotSmi(key, &maybe_name_key);
   __ SmiToInteger32(key, key);
 
   __ CmpInstanceType(r9, JS_ARRAY_TYPE);
   __ j(equal, &array);
   // Check that the object is some kind of JSObject.
   __ CmpInstanceType(r9, FIRST_JS_OBJECT_TYPE);
   __ j(below, &slow);
 
   // Object case: Check key against length in the elements array.
   __ movp(rbx, FieldOperand(receiver, JSObject::kElementsOffset));
   // Check array bounds.
   __ SmiCompareInteger32(FieldOperand(rbx, FixedArray::kLengthOffset), key);
   // rbx: FixedArray
   __ j(above, &fast_object);
 
   // Slow case: call runtime.
   __ bind(&slow);
   __ Integer32ToSmi(key, key);
   __ bind(&slow_with_tagged_index);
   PropertyICCompiler::GenerateRuntimeSetProperty(masm, strict_mode);
   // Never returns to here.
 
+  __ bind(&maybe_name_key);
+  __ movp(r9, FieldOperand(key, HeapObject::kMapOffset));
+  __ movzxbp(r9, FieldOperand(r9, Map::kInstanceTypeOffset));
+  __ JumpIfNotUniqueNameInstanceType(r9, &slow_with_tagged_index);
+  Code::Flags flags = Code::RemoveTypeAndHolderFromFlags(
+      Code::ComputeHandlerFlags(Code::STORE_IC));
+  masm->isolate()->stub_cache()->GenerateProbe(masm, flags, false, receiver,
+                                               key, rbx, no_reg);
+  // Cache miss.
+  if (handler_requirement == kCallRuntimeOnMissingHandler) {
+    __ jmp(&slow_with_tagged_index);
+  } else {
+    DCHECK(handler_requirement == kMissOnMissingHandler);
+    __ jmp(&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);
   // receiver is a JSArray.
   // rbx: receiver's elements array (a FixedArray)
   // flags: smicompare (receiver.length(), rbx)
   __ j(not_equal, &slow);  // do not leave holes in the array
   __ SmiCompareInteger32(FieldOperand(rbx, FixedArray::kLengthOffset), key);
   __ j(below_equal, &slow);
@@ skipping 18 matching lines @@
 
   // Check the key against the length in the array, compute the
   // address to store into and fall through to fast case.
   __ SmiCompareInteger32(FieldOperand(receiver, JSArray::kLengthOffset), key);
   __ j(below_equal, &extra);
 
   KeyedStoreGenerateGenericHelper(masm, &fast_object, &fast_double, &slow,
                                   kCheckMap, kDontIncrementLength);
   KeyedStoreGenerateGenericHelper(masm, &fast_object_grow, &fast_double_grow,
                                   &slow, kDontCheckMap, kIncrementLength);
+
+  if (handler_requirement == kMissOnMissingHandler) {
+    __ bind(&miss);
+    GenerateMiss(masm);
+  }
 }
 
 
 static Operand GenerateMappedArgumentsLookup(
     MacroAssembler* masm, Register object, Register key, Register scratch1,
     Register scratch2, Register scratch3, Label* unmapped_case,
     Label* slow_case) {
   Heap* heap = masm->isolate()->heap();
 
   // Check that the receiver is a JSObject. Because of the elements
@@ skipping 320 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 v8::internal
 
 #endif  // V8_TARGET_ARCH_X64