[arm] Recognize SXTB, SXTH, UXTB and UXTH.

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 {
@@ skipping 17 matching lines @@
   V(ArmMls)                        \
   V(ArmSmmul)                      \
   V(ArmSmmla)                      \
   V(ArmUmull)                      \
   V(ArmSdiv)                       \
   V(ArmUdiv)                       \
   V(ArmMov)                        \
   V(ArmMvn)                        \
   V(ArmBfc)                        \
   V(ArmUbfx)                       \
+  V(ArmSxtb)                       \
+  V(ArmSxth)                       \
+  V(ArmSxtab)                      \
+  V(ArmSxtah)                      \
+  V(ArmUxtb)                       \
+  V(ArmUxth)                       \
+  V(ArmUxtab)                      \
+  V(ArmUxtah)                      \
   V(ArmVcmpF64)                    \
   V(ArmVaddF64)                    \
   V(ArmVsubF64)                    \
   V(ArmVmulF64)                    \
   V(ArmVmlaF64)                    \
   V(ArmVmlsF64)                    \
   V(ArmVdivF64)                    \
   V(ArmVmodF64)                    \
   V(ArmVnegF64)                    \
   V(ArmVsqrtF64)                   \
@@ skipping 39 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_