[llvm-bugs] [Bug 30771] New: Fail to propagate assume to its negation

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=30771

            Bug ID: 30771
           Summary: Fail to propagate assume to its negation
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Interprocedural Analyses
          Assignee: unassignedbugs at nondot.org
          Reporter: rafael.espindola at gmail.com
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

Created attachment 17478
  --> https://llvm.org/bugs/attachment.cgi?id=17478&action=edit
testcase

opt -O3 doesn't simplify this test.

If the two icmps are changed to use the same predicate (eq or ne), the function
is simplified to return a constant.

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