[LLVMbugs] [Bug 12991] New: instcombine crashes

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=12991

             Bug #: 12991
           Summary: instcombine crashes
           Product: new-bugs
           Version: trunk
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: new bugs
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: matt at pharr.org
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified


Created attachment 8660
  --> http://llvm.org/bugs/attachment.cgi?id=8660
test case

With the attached program and top-of-tree, if I run:

% opt -O2 bug.ll > /dev/null

I get a crash:

Stack dump:
0.    Program arguments: opt -O2 bug.ll 
1.    Running pass 'CallGraph Pass Manager' on module 'bug.ll'.
2.    Running pass 'Combine redundant instructions' on function
'@"f_f___un<unf>un<unf>"'
[1]    47804 segmentation fault  opt -O2 bug.ll >| /dev/null

Sorry for not reducing it all the way down with bugpoint; there seems to be a
problem with my installation of it that I haven't yet been able to debug.

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