Runtime error using LLVM bitcode execution

[Mikhail Glushenkov]

Hello Simon,

On 3 March 2014 09:39, Simon Marlow <marlowsd at gmail.com> wrote:
> I believe the problem is that we can't represent the output of the mangler
> in LLVM's intermediate language as it stands.  Although I think it may now
> be possible to do this with LLVM 3.4:
>
> http://www.haskell.org/pipermail/ghc-devs/2013-September/002565.html
>
> GHC's code generator needs to be updated to take advantage of this.  Is
> anyone interested in looking into it?

IIUC, GHC can't take advantage of this yet, because global symbol
offsets [1] are not yet implemented. LLVM currently doesn't allow
arbitrary function prefix data, but requires prefix data to "begin
with a sequence of bytes which decode to a sequence of machine
instructions, [...] which transfer control to the point immediately
succeeding the prefix data" [2].

[1] http://lists.cs.uiuc.edu/pipermail/llvmdev/2013-April/061511.html
[2] http://llvm.org/docs/LangRef.html#prefix-data