[llvm-bugs] [Bug 33668] New: Excessive memory and CPU use in tail duplication and associated passes due to critical edge splitting

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=33668

            Bug ID: 33668
           Summary: Excessive memory and CPU use in tail duplication and
                    associated passes due to critical edge splitting
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Common Code Generator Code
          Assignee: unassignedbugs at nondot.org
          Reporter: joerg at NetBSD.org
                CC: llvm-bugs at lists.llvm.org

Created attachment 18740
  --> https://bugs.llvm.org/attachment.cgi?id=18740&action=edit
Compile for AMD64 with -O2

The attached (unreduced) test case needs 1.6GB peak RAM and ~3min on my laptop
after r296416, before it took 100MB and 1s.

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