[llvm-bugs] [Bug 28424] New: Assertion `InLCSSA && "Requested to preserve LCSSA, but it's already broken."' failed.

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=28424

            Bug ID: 28424
           Summary: Assertion `InLCSSA && "Requested to preserve LCSSA,
                    but it's already broken."' failed.
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Loop Optimizer
          Assignee: unassignedbugs at nondot.org
          Reporter: mikael.holmen at ericsson.com
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

Created attachment 16689
  --> https://llvm.org/bugs/attachment.cgi?id=16689&action=edit
Reproducer ll file

If I do

opt -S -lcssa -indvars red5.ll

on the attached file I get

opt: ../lib/Transforms/Utils/LoopSimplify.cpp:792: virtual bool (anonymous
namespace)::LoopSimplify::runOnFunction(llvm::Function &): Assertion `InLCSSA
&& "Requested to preserve LCSSA, but it's already broken."' failed.

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