[LLVMbugs] [Bug 1559] NEW: Something is horrible broken in the loop optimizer

bugzilla-daemon at cs.uiuc.edu bugzilla-daemon at cs.uiuc.edu
Tue Jul 17 02:23:35 PDT 2007


           Summary: Something is horrible broken in the loop optimizer
           Product: libraries
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Loop Optimizer
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: asl at math.spbu.ru

This stopped llvm-gcc build here. The process ate all memory, because LCSSA
recursed infinitely. I suppose, that this wasn't caught on mainline, because I
have LoopRotate disabled here (it was broken some time ago). And LoopRotate
seems to hide the bug. So, now I have LoopUnswitch disabled also :)

./opt -loop-unswitch bugpoint-reduced-simplified.bc 

Dunno, whether it's the same bug, but anyway it segfaults :)

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