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

src/compiler/arm/instruction-codes-arm.h

 // 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.
 
 #ifndef V8_COMPILER_ARM_INSTRUCTION_CODES_ARM_H_
 #define V8_COMPILER_ARM_INSTRUCTION_CODES_ARM_H_
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
 // ARM-specific opcodes that specify which assembly sequence to emit.
 // Most opcodes specify a single instruction.
 #define TARGET_ARCH_OPCODE_LIST(V) \
   V(ArmAdd)                        \
   V(ArmAnd)                        \
   V(ArmBic)                        \
+  V(ArmClz)                        \
   V(ArmCmp)                        \
   V(ArmCmn)                        \
   V(ArmTst)                        \
   V(ArmTeq)                        \
   V(ArmOrr)                        \
   V(ArmEor)                        \
   V(ArmSub)                        \
   V(ArmRsb)                        \
   V(ArmMul)                        \
   V(ArmMla)                        \
@@ skipping 72 matching lines @@
   V(Operand2_R_ASR_R) /* %r0 ASR %r1 */ \
   V(Operand2_R_LSL_R) /* %r0 LSL %r1 */ \
   V(Operand2_R_LSR_R) /* %r0 LSR %r1 */ \
   V(Operand2_R_ROR_R) /* %r0 ROR %r1 */
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_ARM_INSTRUCTION_CODES_ARM_H_