[turbofan] Introduce initial support for TypedArrays.

src/compiler/machine-operator.cc

Index: src/compiler/machine-operator.cc
diff --git a/src/compiler/machine-operator.cc b/src/compiler/machine-operator.cc
index 74ddd7a3da4663feeaf6bb8b1478aa2109c701a1..d1da6848b00baf523be342ff7ab67516df49effe 100644
--- a/src/compiler/machine-operator.cc
+++ b/src/compiler/machine-operator.cc
@@ -611,6 +611,13 @@ struct MachineOperatorGlobalCache {
                    0, 0, 0, 0, 0) {}
   };
   DebugBreakOperator kDebugBreak;
+
+  struct UnsafePointerAddOperator final : public Operator {
+    UnsafePointerAddOperator()
+        : Operator(IrOpcode::kUnsafePointerAdd, Operator::kKontrol,
+                   "UnsafePointerAdd", 2, 1, 1, 1, 1, 0) {}
+  };
+  UnsafePointerAddOperator kUnsafePointerAdd;
 };
 
 struct CommentOperator : public Operator1<const char*> {
@@ -728,6 +735,10 @@ const Operator* MachineOperatorBuilder::Store(StoreRepresentation store_rep) {
   return nullptr;
 }
 
+const Operator* MachineOperatorBuilder::UnsafePointerAdd() {
+  return &cache_.kUnsafePointerAdd;
+}
+
 const Operator* MachineOperatorBuilder::DebugBreak() {
   return &cache_.kDebugBreak;
 }