{-#
  LANGUAGE
  ForeignFunctionInterface,
  TemplateHaskell,
  ViewPatterns
  #-}
-- | FFI glue for llvm::IRBuilder - llvm's IR construction state object
module LLVM.General.Internal.FFI.Builder where

import LLVM.General.Prelude

import qualified Language.Haskell.TH as TH

import Foreign.Ptr
import Foreign.C

import qualified Data.List as List
import qualified Data.Map as Map

import qualified LLVM.General.AST.Instruction as A
import LLVM.General.Internal.InstructionDefs as ID

import LLVM.General.Internal.FFI.Cleanup
import LLVM.General.Internal.FFI.Context
import LLVM.General.Internal.FFI.LLVMCTypes
import LLVM.General.Internal.FFI.PtrHierarchy

data Builder

foreign import ccall unsafe "LLVMCreateBuilderInContext" createBuilderInContext ::
  Ptr Context -> IO (Ptr Builder)

foreign import ccall unsafe "LLVMDisposeBuilder" disposeBuilder ::
  Ptr Builder -> IO ()

foreign import ccall unsafe "LLVMPositionBuilderAtEnd" positionBuilderAtEnd ::
  Ptr Builder -> Ptr BasicBlock -> IO ()


foreign import ccall unsafe "LLVMBuildRet" buildRet ::
  Ptr Builder -> Ptr Value -> IO (Ptr Instruction)

foreign import ccall unsafe "LLVMBuildBr" buildBr ::
  Ptr Builder -> Ptr BasicBlock -> IO (Ptr Instruction)

foreign import ccall unsafe "LLVMBuildCondBr" buildCondBr ::
  Ptr Builder -> Ptr Value -> Ptr BasicBlock -> Ptr BasicBlock -> IO (Ptr Instruction)

foreign import ccall unsafe "LLVMBuildSwitch" buildSwitch ::
  Ptr Builder -> Ptr Value -> Ptr BasicBlock -> CUInt -> IO (Ptr Instruction)

foreign import ccall unsafe "LLVMBuildIndirectBr" buildIndirectBr ::
  Ptr Builder -> Ptr Value -> CUInt -> IO (Ptr Instruction)

foreign import ccall unsafe "LLVMBuildInvoke" buildInvoke ::
  Ptr Builder -> Ptr Value -> Ptr (Ptr Value) -> CUInt
              -> Ptr BasicBlock -> Ptr BasicBlock -> CString -> IO (Ptr Instruction)
  
foreign import ccall unsafe "LLVMBuildResume" buildResume ::
  Ptr Builder -> Ptr Value -> IO (Ptr Instruction)

foreign import ccall unsafe "LLVMBuildUnreachable" buildUnreachable ::
  Ptr Builder -> IO (Ptr Instruction)


$(do
  liftM concat $ sequence $ do
    let instrInfo = ID.outerJoin ID.astInstructionRecs ID.instructionDefs
    (lrn, ii) <- Map.toList instrInfo
    (TH.RecC _ (unzip3 -> (_, _, fieldTypes)), ID.InstructionDef { ID.cAPIName = a, ID.instructionKind = k }) <- case ii of
      (Just r, Just d) -> return (r,d)
      (Just _, Nothing) -> error $ "An AST instruction was not found in the LLVM instruction defs"
      (Nothing, Just ID.InstructionDef { ID.instructionKind = k }) | k /= ID.Terminator -> 
        error $ "LLVM instruction def " ++ lrn ++ " not found in the AST"
      _ -> []

    let ats = map typeMapping (fieldTypes List.\\ [TH.ConT ''A.InstructionMetadata, TH.ConT ''A.FastMathFlags])
        cName = (if hasFlags fieldTypes then "LLVM_General_" else "LLVM") ++ "Build" ++ a
    rt <- case k of
            ID.Binary -> [[t| BinaryOperator |]]
            ID.Cast -> [[t| Instruction |]]
            _ -> []
    return $ foreignDecl cName ("build" ++ a) ([[t| Ptr Builder |]] ++ ats ++ [[t| CString |]]) [t| Ptr $(rt) |]
 )

foreign import ccall unsafe "LLVMBuildArrayAlloca" buildAlloca ::
  Ptr Builder -> Ptr Type -> Ptr Value -> CString -> IO (Ptr Instruction)

foreign import ccall unsafe "LLVM_General_BuildLoad" buildLoad' ::
  Ptr Builder -> LLVMBool -> Ptr Value -> MemoryOrdering -> LLVMBool -> CUInt -> CString -> IO (Ptr Instruction)

buildLoad builder vol a' (ss, mo) al s = buildLoad' builder vol a' mo ss al s

foreign import ccall unsafe "LLVM_General_BuildStore" buildStore' ::
  Ptr Builder -> LLVMBool -> Ptr Value -> Ptr Value -> MemoryOrdering -> LLVMBool -> CUInt -> CString -> IO (Ptr Instruction)

buildStore builder vol a' v' (ss, mo) al s = buildStore' builder vol a' v' mo ss al s

foreign import ccall unsafe "LLVMBuildGEP" buildGetElementPtr' ::
  Ptr Builder -> Ptr Value -> Ptr (Ptr Value) -> CUInt -> CString -> IO (Ptr Instruction)

foreign import ccall unsafe "LLVMBuildInBoundsGEP" buildInBoundsGetElementPtr' ::
  Ptr Builder -> Ptr Value -> Ptr (Ptr Value) -> CUInt -> CString -> IO (Ptr Instruction)

buildGetElementPtr :: Ptr Builder -> LLVMBool -> Ptr Value -> (CUInt, Ptr (Ptr Value)) -> CString -> IO (Ptr Instruction)
buildGetElementPtr builder (LLVMBool 1) a (n, is) s = buildInBoundsGetElementPtr' builder a is n s
buildGetElementPtr builder (LLVMBool 0) a (n, is) s = buildGetElementPtr' builder a is n s

foreign import ccall unsafe "LLVM_General_BuildFence" buildFence' ::
  Ptr Builder -> MemoryOrdering -> LLVMBool -> CString -> IO (Ptr Instruction)

buildFence builder (ss, mo) s = buildFence' builder mo ss s

foreign import ccall unsafe "LLVM_General_BuildAtomicCmpXchg" buildCmpXchg' ::
  Ptr Builder -> LLVMBool -> Ptr Value -> Ptr Value -> Ptr Value -> MemoryOrdering -> LLVMBool -> CString -> IO (Ptr Instruction)

buildCmpXchg builder vol a e r (ss, mo) s =  buildCmpXchg' builder vol a e r mo ss s

foreign import ccall unsafe "LLVM_General_BuildAtomicRMW" buildAtomicRMW' ::
  Ptr Builder -> LLVMBool -> RMWOperation -> Ptr Value -> Ptr Value -> MemoryOrdering -> LLVMBool -> CString -> IO (Ptr Instruction)

buildAtomicRMW builder vol rmwOp a v (ss, mo) s = buildAtomicRMW' builder vol rmwOp a v mo ss s 

foreign import ccall unsafe "LLVMBuildICmp" buildICmp ::
  Ptr Builder -> ICmpPredicate -> Ptr Value -> Ptr Value -> CString -> IO (Ptr Instruction)

foreign import ccall unsafe "LLVMBuildFCmp" buildFCmp ::
  Ptr Builder -> FCmpPredicate -> Ptr Value -> Ptr Value -> CString -> IO (Ptr Instruction)

foreign import ccall unsafe "LLVMBuildPhi" buildPhi ::
  Ptr Builder -> Ptr Type -> CString -> IO (Ptr Instruction)

foreign import ccall unsafe "LLVMBuildCall" buildCall ::
  Ptr Builder -> Ptr Value -> Ptr (Ptr Value) -> CUInt -> CString -> IO (Ptr Instruction)

foreign import ccall unsafe "LLVMBuildSelect" buildSelect ::
  Ptr Builder -> Ptr Value -> Ptr Value -> Ptr Value -> CString -> IO (Ptr Instruction)

foreign import ccall unsafe "LLVMBuildVAArg" buildVAArg ::
  Ptr Builder -> Ptr Value -> Ptr Type -> CString -> IO (Ptr Instruction)

foreign import ccall unsafe "LLVMBuildExtractElement" buildExtractElement ::
  Ptr Builder -> Ptr Value -> Ptr Value -> CString -> IO (Ptr Instruction)

foreign import ccall unsafe "LLVMBuildInsertElement" buildInsertElement ::
  Ptr Builder -> Ptr Value -> Ptr Value -> Ptr Value -> CString -> IO (Ptr Instruction)

foreign import ccall unsafe "LLVMBuildShuffleVector" buildShuffleVector ::
  Ptr Builder -> Ptr Value -> Ptr Value -> Ptr Constant -> CString -> IO (Ptr Instruction)

foreign import ccall unsafe "LLVM_General_BuildExtractValue" buildExtractValue ::
  Ptr Builder -> Ptr Value -> Ptr CUInt -> CUInt -> CString -> IO (Ptr Instruction)

foreign import ccall unsafe "LLVM_General_BuildInsertValue" buildInsertValue ::
  Ptr Builder -> Ptr Value -> Ptr Value -> Ptr CUInt -> CUInt -> CString -> IO (Ptr Instruction)

foreign import ccall unsafe "LLVMBuildLandingPad" buildLandingPad ::
  Ptr Builder -> Ptr Type -> Ptr Value -> CUInt -> CString -> IO (Ptr Instruction)

foreign import ccall unsafe "LLVM_General_SetFastMathFlags" setFastMathFlags ::
  Ptr Builder -> FastMathFlags -> IO ()