Yes they do. Depending on the architecture, there's either a stack pointer register and CALL/PUSH/POP instructions, or a general purpose auto-increment/decremen

Yes they do. Depending on the architecture, there's either a stack pointer register and CALL/PUSH/POP instructions, or a general purpose auto-increment/decrement addressing mode. Local variables are placed on the stack as well, this is necessary if you want recursion, and it also typically results in faster/shorter code, because the instruction set and microarchitecture are optimized for this type of memory access.