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

src/builtins/builtins-math.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"
 
 namespace v8 {
@@ skipping 115 matching lines @@
   Label loop(assembler, &var_x);
   var_x.Bind(assembler->Parameter(1));
   assembler->Goto(&loop);
   assembler->Bind(&loop);
   {
     // Load the current {x} value.
     Node* x = var_x.value();
 
     // Check if {x} is a Smi or a HeapObject.
     Label if_xissmi(assembler), if_xisnotsmi(assembler);
-    assembler->Branch(assembler->WordIsSmi(x), &if_xissmi, &if_xisnotsmi);
+    assembler->Branch(assembler->TaggedIsSmi(x), &if_xissmi, &if_xisnotsmi);
 
     assembler->Bind(&if_xissmi);
     {
       // Nothing to do when {x} is a Smi.
       assembler->Return(x);
     }
 
     assembler->Bind(&if_xisnotsmi);
     {
       // Check if {x} is a HeapNumber.
@@ skipping 60 matching lines @@
   Label loop(assembler, &var_x);
   var_x.Bind(assembler->Parameter(1));
   assembler->Goto(&loop);
   assembler->Bind(&loop);
   {
     // Load the current {x} value.
     Node* x = var_x.value();
 
     // Check if {x} is a Smi or a HeapObject.
     Label if_xissmi(assembler), if_xisnotsmi(assembler);
-    assembler->Branch(assembler->WordIsSmi(x), &if_xissmi, &if_xisnotsmi);
+    assembler->Branch(assembler->TaggedIsSmi(x), &if_xissmi, &if_xisnotsmi);
 
     assembler->Bind(&if_xissmi);
     {
       var_clz32_x.Bind(assembler->SmiToWord32(x));
       assembler->Goto(&do_clz32);
     }
 
     assembler->Bind(&if_xisnotsmi);
     {
       // Check if {x} is a HeapNumber.
@@ skipping 364 matching lines @@
 void Builtins::Generate_MathMax(MacroAssembler* masm) {
   Generate_MathMaxMin(masm, MathMaxMinKind::kMax);
 }
 
 void Builtins::Generate_MathMin(MacroAssembler* masm) {
   Generate_MathMaxMin(masm, MathMaxMinKind::kMin);
 }
 
 }  // namespace internal
 }  // namespace v8