[stubs] Renames WordIsSmi to TaggedIsSmi, introducing an appropriate bitcast of the parameter.

src/builtins/builtins-global.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.h"
 #include "src/builtins/builtins-utils.h"
 
 #include "src/code-factory.h"
 #include "src/compiler.h"
 #include "src/uri.h"
@@ skipping 103 matching lines @@
   Variable var_num(assembler, MachineRepresentation::kTagged);
   Label loop(assembler, &var_num);
   var_num.Bind(assembler->Parameter(1));
   assembler->Goto(&loop);
   assembler->Bind(&loop);
   {
     // Load the current {num} value.
     Node* num = var_num.value();
 
     // Check if {num} is a Smi or a HeapObject.
-    assembler->GotoIf(assembler->WordIsSmi(num), &return_true);
+    assembler->GotoIf(assembler->TaggedIsSmi(num), &return_true);
 
     // Check if {num} is a HeapNumber.
     Label if_numisheapnumber(assembler),
         if_numisnotheapnumber(assembler, Label::kDeferred);
     assembler->Branch(assembler->WordEqual(assembler->LoadMap(num),
                                            assembler->HeapNumberMapConstant()),
                       &if_numisheapnumber, &if_numisnotheapnumber);
 
     assembler->Bind(&if_numisheapnumber);
     {
@@ skipping 34 matching lines @@
   Variable var_num(assembler, MachineRepresentation::kTagged);
   Label loop(assembler, &var_num);
   var_num.Bind(assembler->Parameter(1));
   assembler->Goto(&loop);
   assembler->Bind(&loop);
   {
     // Load the current {num} value.
     Node* num = var_num.value();
 
     // Check if {num} is a Smi or a HeapObject.
-    assembler->GotoIf(assembler->WordIsSmi(num), &return_false);
+    assembler->GotoIf(assembler->TaggedIsSmi(num), &return_false);
 
     // Check if {num} is a HeapNumber.
     Label if_numisheapnumber(assembler),
         if_numisnotheapnumber(assembler, Label::kDeferred);
     assembler->Branch(assembler->WordEqual(assembler->LoadMap(num),
                                            assembler->HeapNumberMapConstant()),
                       &if_numisheapnumber, &if_numisnotheapnumber);
 
     assembler->Bind(&if_numisheapnumber);
     {
@@ skipping 13 matching lines @@
 
   assembler->Bind(&return_true);
   assembler->Return(assembler->BooleanConstant(true));
 
   assembler->Bind(&return_false);
   assembler->Return(assembler->BooleanConstant(false));
 }
 
 }  // namespace internal
 }  // namespace v8