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

src/runtime/runtime.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_RUNTIME_RUNTIME_H_
 #define V8_RUNTIME_RUNTIME_H_
 
 #include "src/allocation.h"
 #include "src/objects.h"
 #include "src/zone.h"
@@ skipping 676 matching lines @@
   F(TypedArrayMaxSizeInHeap, 0, 1)        \
   F(ArrayBufferViewGetByteLength, 1, 1)   \
   F(ArrayBufferViewGetByteOffset, 1, 1)   \
   F(TypedArrayGetLength, 1, 1)            \
   /* ArrayBuffer */                       \
   F(ArrayBufferGetByteLength, 1, 1)       \
   /* Maths */                             \
   F(ConstructDouble, 2, 1)                \
   F(DoubleHi, 1, 1)                       \
   F(DoubleLo, 1, 1)                       \
+  F(MathClz32, 1, 1)                      \
   F(MathFloor, 1, 1)                      \
   F(MathSqrt, 1, 1)                       \
   F(MathLogRT, 1, 1)                      \
   /* ES6 Collections */                   \
   F(MapClear, 1, 1)                       \
   F(MapDelete, 2, 1)                      \
   F(MapGet, 2, 1)                         \
   F(MapGetSize, 1, 1)                     \
   F(MapHas, 2, 1)                         \
   F(MapInitialize, 1, 1)                  \
@@ skipping 190 matching lines @@
 
 class DeclareGlobalsEvalFlag : public BitField<bool, 0, 1> {};
 class DeclareGlobalsNativeFlag : public BitField<bool, 1, 1> {};
 STATIC_ASSERT(LANGUAGE_END == 3);
 class DeclareGlobalsLanguageMode : public BitField<LanguageMode, 2, 2> {};
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_RUNTIME_RUNTIME_H_