[turbofan] Turn Math.clz32 into an inlinable builtin.

src/hydrogen.h

 // Copyright 2012 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.
 
 #ifndef V8_HYDROGEN_H_
 #define V8_HYDROGEN_H_
 
 #include "src/v8.h"
 
 #include "src/accessors.h"
@@ skipping 2194 matching lines @@
   F(TypedArrayMaxSizeInHeap)           \
   F(ArrayBufferViewGetByteLength)      \
   F(ArrayBufferViewGetByteOffset)      \
   F(TypedArrayGetLength)               \
   /* ArrayBuffer */                    \
   F(ArrayBufferGetByteLength)          \
   /* Maths */                          \
   F(ConstructDouble)                   \
   F(DoubleHi)                          \
   F(DoubleLo)                          \
+  F(MathClz32)                         \
   F(MathFloor)                         \
   F(MathSqrt)                          \
   F(MathLogRT)                         \
   /* ES6 Collections */                \
   F(MapClear)                          \
   F(MapDelete)                         \
   F(MapGet)                            \
   F(MapGetSize)                        \
   F(MapHas)                            \
   F(MapInitialize)                     \
@@ skipping 805 matching lines @@
   }
 
  private:
   HGraphBuilder* builder_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_H_