[llvm-bugs] [Bug 33437] New: tryToUnrollLoop() ... Assertion `Idx >= 0 && "Invalid basic block argument!"' failed

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=33437

            Bug ID: 33437
           Summary: tryToUnrollLoop() ... Assertion `Idx >= 0 && "Invalid
                    basic block argument!"' failed
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Loop Optimizer
          Assignee: unassignedbugs at nondot.org
          Reporter: paulsson at linux.vnet.ibm.com
                CC: llvm-bugs at lists.llvm.org

Created attachment 18629
  --> https://bugs.llvm.org/attachment.cgi?id=18629&action=edit
reduced testcase

bin/opt -O3 -mtriple=s390x-unknown-linux -mcpu=z13 -o out.ll
./invalid_bb_argument.ll

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