[llvm-dev] How to add NOP?

[Erdem Derebaşoğlu via llvm-dev]

I would like to convert a C file that uses OpenMP library to X86 code with a condition: I want to insert a NOP before each instruction that does a private memory access.I have written an optimization pass that inserts an inline assembly call (NOP) but it is applied at IR level, and I cannot determine where to insert it. How can I use LLVM to add NOPs accordingly?
Thanks. 		 	   		  
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