gistfile2.txt

[1 of 1] Compiling Main             ( test.hs, test.o )

test.hs:13:15:
    No instance for (GetElementPtr (Ptr Word8) a n)
      arising from a use of `getElementPtr0'
    Possible fix:
      add an instance declaration for (GetElementPtr (Ptr Word8) a n)
    In a stmt of a 'do' expression: arg1 <- getElementPtr0 argv 1
    In the expression:
      do { entry <- newBasicBlock;
           defineBasicBlock entry;
           arg1 <- getElementPtr0 argv 1;
           ret (0 :: Int32) }
    In the second argument of `($)', namely
      `\ argc argv
         -> do { entry <- newBasicBlock;
                 defineBasicBlock entry;
                 .... }'

test.hs

module Main (main) where

import Data.Int
import Data.Word
import LLVM.Core

bar :: CodeGenModule (Function (Int32 -> Ptr (Ptr Word8) -> IO Int32))
bar = createNamedFunction ExternalLinkage "main" $
  \ argc argv -> do
      entry <- newBasicBlock
      defineBasicBlock entry
      -- error: no instance of GetElementPtr for (Ptr a)
      arg1 <- getElementPtr0 argv 1
      ret (0 :: Int32) 

main = return 0