Most compilers do not consider themselves a security boundary, and will not try to limit malicious code from hijacking the compiler. E.g. LLVM is explicitly not

Most compilers do not consider themselves a security boundary, and will not try to limit malicious code from hijacking the compiler. E.g. LLVM is explicitly not designed to handled malicious code (https://llvm.org/docs/Security.html#what-is-considered-a-security-issue https://llvm.org/docs/Security.html#what-is-considered-a-sec...).