Implement inlined LoadIndexed operation for arrays on x64.

runtime/vm/flow_graph_optimizer.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/flow_graph_optimizer.h"
 
 #include "vm/flow_graph_builder.h"
 #include "vm/il_printer.h"
 #include "vm/object_store.h"
 
@@ skipping 312 matching lines @@
 
 
 void FlowGraphOptimizer::VisitInstanceSetter(InstanceSetterComp* comp) {
   // TODO(srdjan): Add assigneable check node if --enable_type_checks.
   if (comp->HasICData() && !FLAG_enable_type_checks) {
     TryInlineInstanceSetter(comp);
   }
 }
 
 
+void FlowGraphOptimizer::VisitLoadIndexed(LoadIndexedComp* comp) {
+  if (!comp->HasICData()) return;
+
+  const ICData& ic_data = *comp->ic_data();
+  if (ic_data.NumberOfChecks() == 0) return;
+  if (!HasOneTarget(ic_data)) return;
+
+  Function& target = Function::Handle();
+  Class& cls = Class::Handle();
+  ic_data.GetOneClassCheckAt(0, &cls, &target);
+
+  switch (cls.id()) {
+    case kArray:
+    case kImmutableArray:
+    case kGrowableObjectArray:
+      comp->set_receiver_type(static_cast<ObjectKind>(cls.id()));
+  }
+}
+
+
 void FlowGraphOptimizer::VisitDo(DoInstr* instr) {
   instr->computation()->Accept(this);
 }
 
 
 void FlowGraphOptimizer::VisitBind(BindInstr* instr) {
   instr->computation()->Accept(this);
 }
 
 
 }  // namespace dart