Missing Function Attribute "NoFree"

[ogerlach]

I encountered a problem when reading in an LLVM IR and raising it to Haskell AST with moduleAST. After upgrading to llvm-hs 9.0.1 from llvm-hs-8.0.0 I get the following error:

unhandled function attribute enum value: FunctionAttributeKind 26

I could not figure out exactly what FunctionAttributeKind 26 is, but looking at the IR generated by clang, the only new attribute is nofree. This attribute is present in LLVM language reference for version 9 but not for version 8. As far as I can tell, this attribute is not handled in LLVM/Internal/Attribute.hs. Therefore, I assume that nofree causes the error. I hope this information helps for people with more knowledege of LLVM internals than I have.

[cocreature]

Hi, sorry for the lack of response. This should be fixed by #284

[shrebhan]

@cocreature @ogerlach Hello! I am facing this issue while parsing a .ll file generated using gllvm, and I want to build llvm-hs from source, are there any steps for this using Cabal ? My project isn't a big project so it doesn't have a project file, I've done all the installation manually. I have cloned the llvm-hs repo, checked out to the llvm-9 branch (which has this fix - #284) but not sure what to do after this, if someone could help me with the steps, it would be great