[LLVMbugs] [Bug 1510] NEW: xor-inferring optimizations would be nice

bugzilla-daemon at cs.uiuc.edu bugzilla-daemon at cs.uiuc.edu
Thu Jun 14 22:21:57 PDT 2007


           Summary: xor-inferring optimizations would be nice
           Product: libraries
           Version: trunk
          Platform: Macintosh
        OS/Version: MacOS X
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: Scalar Optimizations
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: duraid at octopus.com.au

we don't currently infer that

~( ~(a|b) | (a&b) ) -> a^b

and similar, e.g. ~(~a & ~b) & ~(a&b) -> a^b

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