[ic] Remove dead accessor info support from LoadIC::CompileHandler

BUG=

Change-Id: Ib7d6f1c8cc20f4170607d4f595756a534e3eceb8
Reviewed-on: https://chromium-review.googlesource.com/452382
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#43770}

src/ic/handler-compiler.cc

@@ -95,24 +95,6 @@ Register PropertyHandlerCompiler::Frontend(Handle<Name> name) {
   return reg;
 }
 
-Handle<Code> NamedLoadHandlerCompiler::CompileLoadCallback(
-    Handle<Name> name, Handle<AccessorInfo> callback, Handle<Code> slow_stub) {
-  if (V8_UNLIKELY(FLAG_runtime_stats)) {
-    GenerateTailCall(masm(), slow_stub);
-  }
-  Register reg = Frontend(name);
-  DCHECK(receiver().is(ApiGetterDescriptor::ReceiverRegister()));
-  __ Move(ApiGetterDescriptor::HolderRegister(), reg);
-  // The callback is alive if this instruction is executed,
-  // so the weak cell is not cleared and points to data.
-  Handle<WeakCell> cell = isolate()->factory()->NewWeakCell(callback);
-  __ GetWeakValue(ApiGetterDescriptor::CallbackRegister(), cell);
-
-  CallApiGetterStub stub(isolate());
-  __ TailCallStub(&stub);
-  return GetCode(kind(), name);
-}
-
 Handle<Code> NamedLoadHandlerCompiler::CompileLoadCallback(
     Handle<Name> name, const CallOptimization& call_optimization,
     int accessor_index, Handle<Code> slow_stub) {

src/ic/handler-compiler.h

@@ -129,10 +129,6 @@ class NamedLoadHandlerCompiler : public PropertyHandlerCompiler {
 
   virtual ~NamedLoadHandlerCompiler() {}
 
-  Handle<Code> CompileLoadCallback(Handle<Name> name,
-                                   Handle<AccessorInfo> callback,
-                                   Handle<Code> slow_stub);
-
   Handle<Code> CompileLoadCallback(Handle<Name> name,
                                    const CallOptimization& call_optimization,
                                    int accessor_index, Handle<Code> slow_stub);

src/ic/ic.cc

@@ -1374,12 +1374,9 @@ Handle<Object> LoadIC::GetMapIndependentHandler(LookupIterator* lookup) {
             TRACE_HANDLER_STATS(isolate(), LoadIC_LoadApiGetterDH);
             return smi_handler;
           }
-          if (!IsLoadGlobalIC()) {
           TRACE_HANDLER_STATS(isolate(), LoadIC_LoadApiGetterFromPrototypeDH);
           return LoadFromPrototype(map, holder, lookup->name(), smi_handler);
         }
-          break;  // Custom-compiled handler.
-        }
       }
       TRACE_HANDLER_STATS(isolate(), LoadIC_SlowStub);
       return slow_stub();
@@ -1463,7 +1460,7 @@ Handle<Object> LoadIC::CompileHandler(LookupIterator* lookup,
 
       DCHECK(IsCompatibleReceiver(lookup, map));
       Handle<Object> accessors = lookup->GetAccessors();
-      if (accessors->IsAccessorPair()) {
+      DCHECK(accessors->IsAccessorPair());
       if (lookup->TryLookupCachedProperty()) {
         DCHECK_EQ(LookupIterator::DATA, lookup->state());
         return ComputeHandler(lookup);
@@ -1487,21 +1484,6 @@ Handle<Object> LoadIC::CompileHandler(LookupIterator* lookup,
                                    ->internal_formal_parameter_count();
       return compiler.CompileLoadViaGetter(
           lookup->name(), lookup->GetAccessorIndex(), expected_arguments);
-      } else {
-        DCHECK(accessors->IsAccessorInfo());
-        Handle<AccessorInfo> info = Handle<AccessorInfo>::cast(accessors);
-        DCHECK(v8::ToCData<Address>(info->getter()) != nullptr);
-        DCHECK(AccessorInfo::IsCompatibleReceiverMap(isolate(), info, map));
-        DCHECK(holder->HasFastProperties());
-        DCHECK(!receiver_is_holder);
-        DCHECK(!info->is_sloppy() || receiver->IsJSReceiver());
-        TRACE_HANDLER_STATS(isolate(), LoadIC_LoadCallback);
-        NamedLoadHandlerCompiler compiler(isolate(), map, holder, cache_holder);
-        Handle<Code> code =
-            compiler.CompileLoadCallback(lookup->name(), info, slow_stub());
-        return code;
-      }
-      UNREACHABLE();
     }
 
     case LookupIterator::DATA: {