emit-stuff
https://llvm.org/docs/LangRef.html#data-layout
https://llvm.org/docs/LangRef.html#function-attributes
https://llvm.org/docs/LangRef.html#attribute-groups
https://llvm.org/docs/LangRef.html#terminators
https://llvm.org/docs/LangRef.html#well-formedness
https://llvm.org/docs/LangRef.html#getelementptr-instruction
https://llvm.org/docs/GetElementPtr.html

-O0 -S -emit-llvm
    -c -emit-llvm
    2018
    https://blog.regehr.org/archives/1605