[llvm-dev] Serializing LLVM IR in custom fashion (original) (raw)

Philip Pfaffe via llvm-dev llvm-dev at lists.llvm.org
Thu Sep 6 06:46:57 PDT 2018

Hi,

InstVisitor will give you that switch. Derive from that and you get to handle the different instruction types appropriately.

Cheers, Philip

On Thu, Sep 6, 2018 at 3:41 PM Gleb Popov via llvm-dev < llvm-dev at lists.llvm.org> wrote:

Hello.

I need to write a pass that converts a whole LLVM module into a bytecode for some other VM. VM's instructions resemble LLVM ones pretty much, so it is almost 1-to-1 translation. Basically, I need to do what BitWriterPass does, but using different format for the resulting bytecode. The obvious solution is just to iterate over all Instructions and serialize them using giant switch(i->getOpcode()), however this involves writing much boilerplate code. And I would eventually need to write a deserializer too, so that doubles the boilerplate work. Any ideas how to do that easier way? How much of existing LLVM code can I reuse? Thanks in advance.

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