Convert KeyedLoad indexed interceptor case to a Handler.

src/arm64/code-stubs-arm64.cc

Index: src/arm64/code-stubs-arm64.cc
diff --git a/src/arm64/code-stubs-arm64.cc b/src/arm64/code-stubs-arm64.cc
index 35e6048de6054d23945df52022421471ec577847..93b0e2867b31f03d987aba6422f87555485cff3a 100644
--- a/src/arm64/code-stubs-arm64.cc
+++ b/src/arm64/code-stubs-arm64.cc
@@ -1961,6 +1961,29 @@ void ArgumentsAccessStub::GenerateNewSloppyFast(MacroAssembler* masm) {
 }
 
 
+void LoadIndexedInterceptorStub::Generate(MacroAssembler* masm) {
+  // Return address is in lr.
+  Label slow;
+
+  Register receiver = LoadDescriptor::ReceiverRegister();
+  Register key = LoadDescriptor::NameRegister();
+
+  // Check that the key is an array index, that is Uint32.
+  __ TestAndBranchIfAnySet(key, kSmiTagMask | kSmiSignMask, &slow);
+
+  // Everything is fine, call runtime.
+  __ Push(receiver, key);
+  __ TailCallExternalReference(
+      ExternalReference(IC_Utility(IC::kLoadElementWithInterceptor),
+                        masm->isolate()),
+      2, 1);
+
+  __ Bind(&slow);
+  PropertyAccessCompiler::TailCallBuiltin(
+      masm, PropertyAccessCompiler::MissBuiltin(Code::KEYED_LOAD_IC));
+}
+
+
 void ArgumentsAccessStub::GenerateNewStrict(MacroAssembler* masm) {
   // Stack layout on entry.
   //  jssp[0]:  number of parameters (tagged)