fn testOneShiftCase(comptime function: enum
fn testOneShiftCase(comptime function: enum { llshr, llshl }, case: Case) !void { const func = if (function == .llshl) llshl else llshr; const shift_direction = if (function == .llshl) -1 else 1; try testOneShiftCaseNoAliasing(func, case); try testOneShiftCaseAliasing(func, case, shift_direction); }