The question may be somewhat unclear

Using the Dyninst (Dynamic binary instrumentation) tool, we can inspect a binary file in order to understand the behavior of execution. I want to insert "STORE INSTRUCTIONS" at specific locations inside the code. These store instructions will be ignore later, i.e. they don't have any importance. So, to avoid the memory overhead that can be result due to extra store instructions, What is the most lightweight x86 store instruction?

I don't want to write any specific data to memory using store instructions. Just, I want to insert a lightweight store instruction at a specific location inside code. After that, these inserted store instructions will be distinguished by Hardware Performance Counters (HPCs). Again, they don't have any purpose.

any help will be appreciated