[llvm-bugs] [Bug 39270] New: fatal error: error in backend: A @@ version cannot be undefined

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=39270

            Bug ID: 39270
           Summary: fatal error: error in backend: A @@ version cannot be
                    undefined
           Product: new-bugs
           Version: trunk
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: dimitry at andric.com
                CC: llvm-bugs at lists.llvm.org

Via
https://lists.freebsd.org/pipermail/freebsd-toolchain/2018-October/004041.html
comes this reduced test case from alsa-lib on powerpc64, which triggers a
"fatal error: error in backend: A @@ version cannot be undefined":

int main()
{
  __asm__ (".symver __foo,foo@@FOO");
  __asm__ (".symver .__foo,.foo@@FOO");
}

Not sure if it is possible to produce a somewhat friendlier error here, or
somehow accept the code anyway.

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