Preserve dead code during compilation

preserve_dead_code.c

// works on all architectures and optimization levels in GCC and clang
// Dead code is optimized like running code and may be removed if the
// compiler can prove that no branches will ever reach it.

#define preserve_dead_code(body) ({ \
	__label__ label;            \
	asm goto(""::::label);      \
	if(0)label:{body}           \
	&&label;                    \
})

int main(){
	preserve_dead_code( //will always be preserved
		puts("Hello, World!");
	);
	
	if(0){
		preserve_dead_code( //will be removed
			puts("Lorem ipsum");
		);
	}
}