[turbofan] Introduce initial support for TypedArrays.

src/compiler/memory-optimizer.cc

 // Copyright 2016 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/compiler/memory-optimizer.h"
 
 #include "src/compiler/js-graph.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/node-properties.h"
@@ skipping 74 matching lines @@
       return VisitStoreElement(node, state);
     case IrOpcode::kStoreField:
       return VisitStoreField(node, state);
     case IrOpcode::kCheckedLoad:
     case IrOpcode::kCheckedStore:
     case IrOpcode::kDeoptimizeIf:
     case IrOpcode::kDeoptimizeUnless:
     case IrOpcode::kIfException:
     case IrOpcode::kLoad:
     case IrOpcode::kStore:
+    case IrOpcode::kRetain:
+    case IrOpcode::kUnsafePointerAdd:
       return VisitOtherEffect(node, state);
     default:
       break;
   }
   DCHECK_EQ(0, node->op()->EffectOutputCount());
 }
 
 void MemoryOptimizer::VisitAllocate(Node* node, AllocationState const* state) {
   DCHECK_EQ(IrOpcode::kAllocate, node->opcode());
   Node* value;
@@ skipping 387 matching lines @@
   return jsgraph()->common();
 }
 
 MachineOperatorBuilder* MemoryOptimizer::machine() const {
   return jsgraph()->machine();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8