[LLVMbugs] [Bug 4200] New: Pass Manager Hangs

bugzilla-daemon at cs.uiuc.edu bugzilla-daemon at cs.uiuc.edu
Tue May 12 06:40:14 PDT 2009


           Summary: Pass Manager Hangs
           Product: new-bugs
           Version: unspecified
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: new bugs
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: npjohnso at cs.princeton.edu
                CC: llvmbugs at cs.uiuc.edu

With this particular pattern of passes requiring one another and LoopSimplify
and CallGraph, pass manager never terminates.

I have confirmed this with gcc 4.1.2 and 4.2.4 against llvm svn revision 68820.

To recreate this bug,

Compile the attached C++ source code to a shared library

Run opt:

opt -load ./libBug.so -after input.bc -o output.bc

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