[Bug target/77455] New: [AArch64] eh_return implementation fails

[wdijkstr at arm dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77455

            Bug ID: 77455
           Summary: [AArch64] eh_return implementation fails
           Product: gcc
           Version: 4.8.4
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: wdijkstr at arm dot com
  Target Milestone: ---

The __builtin_eh_return implementation on AArch64 generates incorrect code for
many cases due to using an incorrect offset/pointer when writing the new return
address to the stack. Also optimizations may remove the write due to a missing
scheduling barrier. As a result in most cases eh_return does not work properly.