[LLVMbugs] [Bug 977] NEW: LCSSA code dereferences NULL pointer

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=977

           Summary: LCSSA code dereferences NULL pointer
           Product: libraries
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Transformation Utilities
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: criswell at uiuc.edu


When run on the attached test case, the opt tool crases from a SEGFAULT. 
Initial investigation shows that LCSSA::GetValueForBlock is being passed a NULL
pointer for the BB operand and attempts to dereference it.



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