Index: source/Plugins/Instruction/ARM64/EmulateInstructionARM64.h
===================================================================
--- source/Plugins/Instruction/ARM64/EmulateInstructionARM64.h
+++ source/Plugins/Instruction/ARM64/EmulateInstructionARM64.h
@@ -46,9 +46,6 @@
             case lldb_private::eInstructionTypePCModifying:
             case lldb_private::eInstructionTypeAll:
                 return false;
-                
-            default:
-                break;
         }
         return false;
     }
Index: source/Plugins/Instruction/ARM64/EmulateInstructionARM64.cpp
===================================================================
--- source/Plugins/Instruction/ARM64/EmulateInstructionARM64.cpp
+++ source/Plugins/Instruction/ARM64/EmulateInstructionARM64.cpp
@@ -58,14 +58,7 @@
     return ~x;
 }
 
-
-static inline int64_t
-SignExtend64(uint64_t x, uint32_t msbit) 
-{
-    return int64_t(x << (64 - msbit)) >> (64 - msbit);
-}
-
-
+#if 0
 // LSL_C() 
 // =======
 static inline uint64_t
@@ -76,6 +69,7 @@
     carry_out = ((1ull << (64-1)) >> (shift - 1)) != 0;
     return result;
 }
+#endif
 
 // LSL()
 // =====