[llvm-bugs] [Bug 47061] New: Failure to optimize bit magic to xor+and

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=47061

            Bug ID: 47061
           Summary: Failure to optimize bit magic to xor+and
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Scalar Optimizations
          Assignee: unassignedbugs at nondot.org
          Reporter: gabravier at gmail.com
                CC: llvm-bugs at lists.llvm.org

int f(int a, int b, int c)
{
    return (a && !b && c) || (!a && b && c);
}

This can be optimized to `((bool)a ^ (bool)b) & (bool)c`. This transformation
is done by GCC, but not by LLVM.

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