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

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Thu Apr 21 06:31:09 PDT 2011


           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
-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 *** 
... [continues for hundreds of pages] ...

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

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