[LLVMbugs] [Bug 9775] New: segfault in opt -loop-unswitch -print-before-all

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=9775

           Summary: segfault in opt -loop-unswitch -print-before-all
           Product: libraries
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Loop Optimizer
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: jay.foad at gmail.com
                CC: llvmbugs at cs.uiuc.edu


I get:

$ /home/jay/llvm/objdir/Release+Asserts/bin/opt -loop-unswitch
-verify-loop-info -verify-dom-info
/home/jay/svn/llvm-project/llvm/trunk/test/Transforms/LoopUnswitch/preserve-analyses.ll
-disable-output -print-before-all 2>2
Segmentation fault
$ less 2
...
bb6:                                              ; preds = %bb5, %bb2
  %5 = icmp eq i32 %8, %1
  br i1 %5, label %bb7, label %bb8.backedge
*** IR Dump Before Unswitch loops *** 
%"8\CCO\02\00\00\00\00x\ACP\02\00\00\00\0
0\00\ACP\02\00\00\00\00\E0\A8P\02\00\00\00\00\F0\DAP\02\00\00\00\00\F0\DDP\02\00
\00\00\00P\DAP\02\00\00\00\00\C0\A3P\02\00\00\00\00\88r\80'\0D\7F\00\00!\00\00\0
0\00\00\00\00\03\00\00\00\0D\7F\00\00\A0\ABP\02\00\00\00\00bb2\00\00\00\00\00A\0
... [continues for hundreds of pages] ...

I'm running LLVM from svn trunk updated a few minutes ago, on Ubuntu 10.10
x86_64.

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