[llvm-bugs] [Bug 31851] New: Forming and verifying LCSSA can take forever due to updater speed

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=31851

            Bug ID: 31851
           Summary: Forming and verifying LCSSA can take forever due to
                    updater speed
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: Scalar Optimizations
          Assignee: unassignedbugs at nondot.org
          Reporter: dberlin at dberlin.org
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

Attached is a testcase where forming and verifying LCSSA accounts for 80+% of
the time, and several minutes.

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