ASM volatile ("B .")

During development, we often have this requirement, that is, starting from a code segment and tracing debugging step by step. Some people say that a while (1) loop is added, in fact, after this loop is added, the code behind it will be optimized and will not reach our goal. A better way is to insert a statement as needed: ASM volatile ("B. "); in this way, not only does the code behind it not be optimized by the compiler, but it also achieves our purpose of tracking and debugging code.

ASM volatile ("B .")