[Bug sanitizer/60569] New: Segfault with -flto and -fsanitize=undefined

[trippels at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60569

            Bug ID: 60569
           Summary: Segfault with -flto and -fsanitize=undefined
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: sanitizer
          Assignee: unassigned at gcc dot gnu.org
          Reporter: trippels at gcc dot gnu.org
                CC: dodji at gcc dot gnu.org, dvyukov at gcc dot gnu.org,
                    jakub at gcc dot gnu.org, kcc at gcc dot gnu.org

Building Firefox with -flto and -fsanitize=undefined crashes gcc on
final libxul link.

markus@x4 skia % cat test.ii
class A
{
  void m_fn1 ();
  enum TriState
  {
    kUnknown_TriState
  };
  struct
  {
    TriState fMSAAEnabled;
    void m_fn1 () { fMSAAEnabled = kUnknown_TriState; }
  } fHWAAState;
};

void A::m_fn1 () { fHWAAState.m_fn1 (); }

markus@x4 skia % g++ -fsanitize=undefined -r -nostdlib -flto test.ii
test.ii: In member function ‘m_fn1’:
test.ii:11:10: internal compiler error: Segmentation fault
     void m_fn1 () { fMSAAEnabled = kUnknown_TriState; }
          ^
Please submit a full bug report,