MIPS64: Fix [KeyedLoadIC] Support Smi "handlers" for element loads

src/code-stub-assembler.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/code-stub-assembler.h"
 #include "src/code-factory.h"
 #include "src/frames-inl.h"
 #include "src/frames.h"
 #include "src/ic/handler-configuration.h"
 #include "src/ic/stub-cache.h"
@@ skipping 1805 matching lines @@
   Goto(&if_join);
   Bind(&if_join);
   return var_result.value();
 }
 
 Node* CodeStubAssembler::ChangeUint32ToTagged(Node* value) {
   Label if_overflow(this, Label::kDeferred), if_not_overflow(this),
       if_join(this);
   Variable var_result(this, MachineRepresentation::kTagged);
   // If {value} > 2^31 - 1, we need to store it in a HeapNumber.
-  Branch(Int32LessThan(value, Int32Constant(0)), &if_overflow,
+  Branch(Uint32LessThan(Int32Constant(Smi::kMaxValue), value), &if_overflow,
          &if_not_overflow);
+
   Bind(&if_not_overflow);
   {
     if (Is64()) {
       var_result.Bind(SmiTag(ChangeUint32ToUint64(value)));
     } else {
       // If tagging {value} results in an overflow, we need to use a HeapNumber
       // to represent it.
       Node* pair = Int32AddWithOverflow(value, value);
       Node* overflow = Projection(1, pair);
       GotoIf(overflow, &if_overflow);
@@ skipping 2140 matching lines @@
                        Heap::kTheHoleValueRootIndex);
 
   // Store the WeakCell in the feedback vector.
   StoreFixedArrayElement(feedback_vector, slot, cell, UPDATE_WRITE_BARRIER,
                          CodeStubAssembler::SMI_PARAMETERS);
   return cell;
 }
 
 }  // namespace internal
 }  // namespace v8