[interpreter][stubs] Fixing issues found by machine graph verifier.

src/builtins/builtins-conversion.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/builtins/builtins-utils.h"
 #include "src/builtins/builtins.h"
 #include "src/code-factory.h"
 #include "src/code-stub-assembler.h"
 
 namespace v8 {
@@ skipping 326 matching lines @@
   {
     // Shared entry points.
     Label return_len(&assembler),
         return_two53minus1(&assembler, Label::kDeferred),
         return_zero(&assembler, Label::kDeferred);
 
     // Load the current {len} value.
     Node* len = var_len.value();
 
     // Check if {len} is a positive Smi.
-    assembler.GotoIf(assembler.WordIsPositiveSmi(len), &return_len);
+    assembler.GotoIf(assembler.TaggedIsPositiveSmi(len), &return_len);
 
     // Check if {len} is a (negative) Smi.
     assembler.GotoIf(assembler.TaggedIsSmi(len), &return_zero);
 
     // Check if {len} is a HeapNumber.
     Label if_lenisheapnumber(&assembler),
         if_lenisnotheapnumber(&assembler, Label::kDeferred);
     assembler.Branch(assembler.IsHeapNumberMap(assembler.LoadMap(len)),
                      &if_lenisheapnumber, &if_lenisnotheapnumber);
 
@@ skipping 124 matching lines @@
   CodeStubAssembler assembler(state);
 
   Node* object = assembler.Parameter(Descriptor::kObject);
   Node* context = assembler.Parameter(Descriptor::kContext);
 
   assembler.Return(assembler.Typeof(object, context));
 }
 
 }  // namespace internal
 }  // namespace v8