Compiler with built-in AV = No virus development?

Is it possible to produce compilers that heuristically check for malware behaviour? If it is possible why has not it been implemented? Wouldn't that strongly help preventing the production of such viruses, I mean why wait to stop them once they are out there?

Even if these people use a compiler that does not use the "proposed" built in AV, personal AV could detect that and grade the file as risky (sort of like SSL Certificates)