[turbofan] Introduce a dedicated CheckBounds operator.

src/compiler/simplified-lowering.cc

 // Copyright 2014 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/simplified-lowering.h"
 
 #include <limits>
 
 #include "src/address-map.h"
 #include "src/base/bits.h"
@@ skipping 1515 matching lines @@
               jsgraph_->isolate(), jsgraph_->zone(), callable.descriptor(), 0,
               flags, properties);
           node->InsertInput(jsgraph_->zone(), 0,
                             jsgraph_->HeapConstant(callable.code()));
           node->AppendInput(jsgraph_->zone(), jsgraph_->NoContextConstant());
           node->AppendInput(jsgraph_->zone(), jsgraph_->graph()->start());
           NodeProperties::ChangeOp(node, jsgraph_->common()->Call(desc));
         }
         return;
       }
+
+      case IrOpcode::kCheckBounds: {
+        VisitBinop(node, UseInfo::CheckedSigned32AsWord32(),
+                   UseInfo::TruncatingWord32(), MachineRepresentation::kWord32);
+        return;
+      }
+
       case IrOpcode::kAllocate: {
         ProcessInput(node, 0, UseInfo::TruncatingWord32());
         ProcessRemainingInputs(node, 1);
         SetOutput(node, MachineRepresentation::kTagged);
         return;
       }
       case IrOpcode::kLoadField: {
         FieldAccess access = FieldAccessOf(node->op());
         ProcessInput(node, 0, UseInfoForBasePointer(access));
         ProcessRemainingInputs(node, 1);
@@ skipping 1334 matching lines @@
         isolate(), graph()->zone(), callable.descriptor(), 0, flags,
         Operator::kNoProperties);
     to_number_operator_.set(common()->Call(desc));
   }
   return to_number_operator_.get();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8