[builtins] Migrate Math.clz32 to a TurboFan builtin.

src/bootstrapper.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/bootstrapper.h"
 
 #include "src/accessors.h"
 #include "src/api-natives.h"
 #include "src/code-stubs.h"
 #include "src/extensions/externalize-string-extension.h"
@@ skipping 1502 matching lines @@
         cons,
         Handle<Object>(native_context()->initial_object_prototype(), isolate));
     cons->shared()->set_instance_class_name(*name);
     Handle<JSObject> math = factory->NewJSObject(cons, TENURED);
     DCHECK(math->IsJSObject());
     JSObject::AddProperty(global, name, math, DONT_ENUM);
     SimpleInstallFunction(math, "acos", Builtins::kMathAcos, 1, true);
     SimpleInstallFunction(math, "asin", Builtins::kMathAsin, 1, true);
     SimpleInstallFunction(math, "atan", Builtins::kMathAtan, 1, true);
     SimpleInstallFunction(math, "ceil", Builtins::kMathCeil, 1, true);
+    SimpleInstallFunction(math, "clz32", Builtins::kMathClz32, 1, true);
     Handle<JSFunction> math_floor =
         SimpleInstallFunction(math, "floor", Builtins::kMathFloor, 1, true);
     native_context()->set_math_floor(*math_floor);
     SimpleInstallFunction(math, "fround", Builtins::kMathFround, 1, true);
     SimpleInstallFunction(math, "imul", Builtins::kMathImul, 2, true);
     SimpleInstallFunction(math, "max", Builtins::kMathMax, 2, false);
     SimpleInstallFunction(math, "min", Builtins::kMathMin, 2, false);
     SimpleInstallFunction(math, "round", Builtins::kMathRound, 1, true);
     Handle<JSFunction> math_sqrt =
         SimpleInstallFunction(math, "sqrt", Builtins::kMathSqrt, 1, true);
@@ skipping 2097 matching lines @@
 }
 
 
 // Called when the top-level V8 mutex is destroyed.
 void Bootstrapper::FreeThreadResources() {
   DCHECK(!IsActive());
 }
 
 }  // namespace internal
 }  // namespace v8