[llvm-bugs] [Bug 41352] New: DAG Combining 1 time regression in r357256

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https://bugs.llvm.org/show_bug.cgi?id=41352

            Bug ID: 41352
           Summary: DAG Combining 1 time regression in r357256
           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: llvm at inglorion.net
                CC: llvm-bugs at lists.llvm.org

r357256 causes pathologically slow DAG Combining 1 times on some inputs. I
observed an increase from ~0.7s to >700s, more than 1000x.

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