[LLVMdev] [Noob] Docs for SelectionDAGs?

[Eli Friedman]

On Thu, Oct 21, 2010 at 12:05 PM, Robert Baruch
<autophile at zoominternet.net> wrote:
> Hi all,
>
> Just getting started with LLVM, and trying to write a back end for a toy hypothetical processor. I'm using llvm-gcc with -emit-llvm to see the LLVM code. The LLVM code is very well-documented at http://llvm.org/docs/LangRef.html. However, I'm looking for equivalent documentation for SelectionDAGs. As I understand it, instructions in the target specification get matched against the SelectionDAGs, not against the LLVM code. So where do I go to ensure that I'm correctly defining everything that needs to be defined?

http://llvm.org/docs/CodeGenerator.html#selectiondag_intro should be
enough to get you started.

-Eli