[turbofan] Fix recognition of Uint32Div in simplified lowering.

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/base/bits.h"
 #include "src/code-factory.h"
@@ skipping 614 matching lines @@
         if (lower()) node->set_op(Float64Op(node));
         break;
       }
       case IrOpcode::kNumberDivide: {
         if (CanLowerToInt32Binop(node, use)) {
           // => signed Int32Div
           VisitInt32Binop(node);
           if (lower()) DeferReplacement(node, lowering->Int32Div(node));
           break;
         }
-        if (CanLowerToUint32Binop(node, use)) {
+        if (BothInputsAre(node, Type::Unsigned32()) && !CanObserveNaN(use)) {
           // => unsigned Uint32Div
           VisitUint32Binop(node);
           if (lower()) DeferReplacement(node, lowering->Uint32Div(node));
           break;
         }
         // => Float64Div
         VisitFloat64Binop(node);
         if (lower()) node->set_op(Float64Op(node));
         break;
       }
@@ skipping 823 matching lines @@
 
 void SimplifiedLowering::DoStringLessThanOrEqual(Node* node) {
   node->set_op(machine()->IntLessThanOrEqual());
   node->ReplaceInput(0, StringComparison(node, true));
   node->ReplaceInput(1, jsgraph()->SmiConstant(EQUAL));
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8