http://llvm.org/bugs/show_bug.cgi?id=21191

            Bug ID: 21191
           Summary: globalopt removes a member of a comdat
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P
         Component: Interprocedural Optimizations
          Assignee: [email protected]
          Reporter: [email protected]
                CC: [email protected], [email protected]
    Classification: Unclassified

This is similar to pr20981, but with globalopt:
-------------------------------------------------
$ cat test.ll
$c = comdat any
define linkonce_odr void @foo() comdat $c {
  ret void
}
define linkonce_odr void @bar() comdat $c {
  ret void
}
define void @zed()  {
  call void @foo()
  ret void
}
$ ./build-patch/bin/opt -globalopt -S test.ll -o - 
; ModuleID = 'test.ll'

$c = comdat any

define linkonce_odr void @foo() comdat $c {
  ret void
}

define void @zed() {
  call void @foo()
  ret void
}
---------------------------------------------

Note that bar has been removed.

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