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

src/compiler/opcodes.h

 // Copyright 2013 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_COMPILER_OPCODES_H_
 #define V8_COMPILER_OPCODES_H_
 
 // Opcodes for control operators.
 #define INNER_CONTROL_OP_LIST(V) \
   V(Dead)                        \
@@ skipping 190 matching lines @@
   MACHINE_COMPARE_BINOP_LIST(V) \
   V(Load)                       \
   V(Store)                      \
   V(Word32And)                  \
   V(Word32Or)                   \
   V(Word32Xor)                  \
   V(Word32Shl)                  \
   V(Word32Shr)                  \
   V(Word32Sar)                  \
   V(Word32Ror)                  \
+  V(Word32Clz)                  \
   V(Word64And)                  \
   V(Word64Or)                   \
   V(Word64Xor)                  \
   V(Word64Shl)                  \
   V(Word64Shr)                  \
   V(Word64Sar)                  \
   V(Word64Ror)                  \
   V(Int32Add)                   \
   V(Int32AddWithOverflow)       \
   V(Int32Sub)                   \
@@ skipping 111 matching lines @@
            (kNumberEqual <= value && value <= kStringLessThanOrEqual) ||
            (kWord32Equal <= value && value <= kFloat64LessThanOrEqual);
   }
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_OPCODES_H_