[llvm-bugs] [Bug 27109] New: LVI only understands one range check idiom

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=27109

            Bug ID: 27109
           Summary: LVI only understands one range check idiom
           Product: new-bugs
           Version: unspecified
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: chandlerc at gmail.com
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

Created attachment 16115
  --> https://llvm.org/bugs/attachment.cgi?id=16115&action=edit
Test case from John Regehr

There are numerous other range check idioms. We either need much more powerful
canonicalization or more patterns. I suspect a bit of both.

Attached is a test case from John Regehr as one motivating example.

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