[LLVMbugs] [Bug 6747] New: missed optimization for inline virtual methods

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=6747

           Summary: missed optimization for inline virtual methods
           Product: clang
           Version: unspecified
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: rafael.espindola at gmail.com
                CC: llvmbugs at cs.uiuc.edu, dgregor at apple.com


Given the translation unit

struct foo {
  virtual void bar();
  virtual void baz() {}
};
void zed() {
  foo b;
  b.baz();
}

we currently produce

define linkonce_odr void @_ZN3foo3bazEv

it should probably be available_externally. Given that the function is virtual
and we know we will have a vtable in some other translation unit, we can
produce this one as available_externally.

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