[turbofan] Also optimize unsigned division by constant.

src/compiler/change-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/change-lowering.h"
 
 #include "src/compiler/js-graph.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/machine-operator.h"
 
@@ skipping 35 matching lines @@
   STATIC_ASSERT(HeapNumber::kValueOffset % kPointerSize == 0);
   const int heap_number_value_offset =
       ((HeapNumber::kValueOffset / kPointerSize) * (machine()->Is64() ? 8 : 4));
   return jsgraph()->IntPtrConstant(heap_number_value_offset - kHeapObjectTag);
 }
 
 
 Node* ChangeLowering::SmiMaxValueConstant() {
   const int smi_value_size = machine()->Is32() ? SmiTagging<4>::SmiValueSize()
                                                : SmiTagging<8>::SmiValueSize();
-  return jsgraph()->IntPtrConstant(
+  return jsgraph()->Int32Constant(
       -(static_cast<int>(0xffffffffu << (smi_value_size - 1)) + 1));
 }
 
 
 Node* ChangeLowering::SmiShiftBitsConstant() {
   const int smi_shift_size = machine()->Is32() ? SmiTagging<4>::SmiShiftSize()
                                                : SmiTagging<8>::SmiShiftSize();
   return jsgraph()->IntPtrConstant(smi_shift_size + kSmiTagSize);
 }
 
@@ skipping 183 matching lines @@
 }
 
 
 MachineOperatorBuilder* ChangeLowering::machine() const {
   return jsgraph()->machine();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8