Specifying a target architecture (ISA) when compiling does not change the programming language's semantics. C is not a high-level assembly language, as pointed

Specifying a target architecture (ISA) when compiling does not change the programming language's semantics. C is not a high-level assembly language, as pointed out in the article. So just because you know that the target CPU supports e.g. unaligned accesses does not make them suddenly valid C.