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llvmllvm-clangllvm-ir

How to get the textual representation of an LLVM IR instruction?

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

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

Solution

  • Well, LLVM provides a string stream as well:

    #include <llvm/Support/raw_ostream.h>

    Use it like this:

    std::string str;
llvm::raw_string_ostream(str) << I;

// use str