[llvm-dev] How to get the textual representation of an IR instruction?

[Dipanjan Das via llvm-dev]

If 'I' is of type llvm::Instruction, we can print out the human-readable
form (textual representation) of it by by, errs() << I;

I want the assign the exact same representation to a std::string to C type
string. How can I do that?

-- 

Thanks & Regards,
Dipanjan
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