llvm dev - Jun 2020 - How to prevent llvm's default optimization

Hello, 
I have an instruction pattern like
  %2 = add i32 %0, 25
  %3 = mul i32 %2, 525


and llvm will optimize it to
%2 = mul i32 %0, 525
%3 = add i32 %2, 12525


how to prevent it? 

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