Eliminate special keyed load string stub in favor of uniform handlers.

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 385 matching lines @@
   GenerateDictionaryLoad(masm, &slow, rbx, key, rax, rdi, rax);
   __ IncrementCounter(counters->keyed_load_generic_symbol(), 1);
   __ ret(0);
 
   __ bind(&index_name);
   __ IndexFromHash(rbx, key);
   __ jmp(&index_smi);
 }
 
 
-void KeyedLoadIC::GenerateString(MacroAssembler* masm) {
-  // Return address is on the stack.
-  Label miss;
-
-  Register receiver = LoadDescriptor::ReceiverRegister();
-  Register index = LoadDescriptor::NameRegister();
-  Register scratch = rbx;
-  Register result = rax;
-  DCHECK(!scratch.is(receiver) && !scratch.is(index));
-
-  StringCharAtGenerator char_at_generator(receiver, index, scratch, result,
-                                          &miss,  // When not a string.
-                                          &miss,  // When not a number.
-                                          &miss,  // When index out of range.
-                                          STRING_INDEX_IS_ARRAY_INDEX);
-  char_at_generator.GenerateFast(masm);
-  __ ret(0);
-
-  StubRuntimeCallHelper call_helper;
-  char_at_generator.GenerateSlow(masm, call_helper);
-
-  __ bind(&miss);
-  GenerateMiss(masm);
-}
-
-
 static void KeyedStoreGenerateGenericHelper(
     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(rdx));
@@ skipping 539 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