[llvm-bugs] [Bug 27111] New: opt -loop-reduce -loop-reduce triggers a segfault

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=27111

            Bug ID: 27111
           Summary: opt -loop-reduce -loop-reduce triggers a segfault
           Product: new-bugs
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: bobbymarly at hotmail.com
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

Created attachment 16117
  --> https://llvm.org/bugs/attachment.cgi?id=16117&action=edit
Bugpoint Reduced code

Running the loop-reduce pass twice in a row (on ver 3.9) triggers a segfault in
the program. This doesn't happen if the pass is only run once. 

This bug was also reproduced for v3.4. Other C++ programs I've run don't crash
if the pass is run twice in a row.

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