Function LLVMConstByteOfStringAndSize 

pub unsafe extern "C" fn LLVMConstByteOfStringAndSize(
    ByteTy: LLVMTypeRef,
    Text: *const c_char,
    SLen: c_uint,
    Radix: u8,
) -> LLVMValueRef

Obtain a constant value for a byte parsed from a string with specified length.