[llvm-bugs] [Bug 45623] New: FixIrreducible crashes with: Assertion `I != SubLoops.end() && "Cannot remove end iterator!"' failed.

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=45623

            Bug ID: 45623
           Summary: FixIrreducible crashes with: Assertion `I !=
                    SubLoops.end() && "Cannot remove end iterator!"'
                    failed.
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Transformation Utilities
          Assignee: unassignedbugs at nondot.org
          Reporter: alonzakai at gmail.com
                CC: llvm-bugs at lists.llvm.org

Created attachment 23393
  --> https://bugs.llvm.org/attachment.cgi?id=23393&action=edit
testcase

STR:

  opt -fix-irreducible a.o -o b.o

Testcase is regexec.c from musl (specifically emscripten, emcc
system/lib/libc/musl/src/regex/regexec.c -o a.o -flto).

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