Bug ID: 34127
           Summary: [AArch64] Add support for stack protector using
                    pointer authentication
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Backend: AArch64

The ARMV8.3a extensions add new instructions for pointer authentication.  We
should use these instructions to optimize the -fstack-protector implementation.
 This feature is already present in GCC.

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