[LLVMbugs] [Bug 13399] New: loop deletion turns MultiSource/Benchmarks/SciMark2-C into an infinite loop

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=13399

             Bug #: 13399
           Summary: loop deletion turns MultiSource/Benchmarks/SciMark2-C
                    into an infinite loop
           Product: libraries
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Loop Optimizer
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: nlewycky at google.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified


Created attachment 8921
  --> http://llvm.org/bugs/attachment.cgi?id=8921
testcase

The attached .ll file is reduced from bugpoint. The fundamental problem is that
opt -loop-deletion removes the %inc.i step incrementing the variable that feeds
back into the storemerge phi node.

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