Add an empty let before starting normalization.

[matthijs/master-project/cλash.git] / CoreTools.hs

diff --git a/CoreTools.hs b/CoreTools.hs
index a9114565c9aca9c732bc1c73848637b53a787f79..73904b935f7b266b8be6e84c7553287d91a60c22 100644 (file)
--- a/CoreTools.hs
+++ b/CoreTools.hs
@@ -3,7 +3,10 @@
 -- Core and Haskell (it uses HsTools for this), but only the functions that
 -- know about various libraries and know which functions to call.
 module CoreTools where
 -- Core and Haskell (it uses HsTools for this), but only the functions that
 -- know about various libraries and know which functions to call.
 module CoreTools where

-  
+
+--Standard modules
+import qualified Maybe
+

 -- GHC API
 import qualified GHC
 import qualified Type
 -- GHC API
 import qualified GHC
 import qualified Type


@@ -11,11 +14,18 @@ import qualified HsExpr
 import qualified HsTypes
 import qualified HsBinds
 import qualified RdrName
 import qualified HsTypes
 import qualified HsBinds
 import qualified RdrName

+import qualified Name

 import qualified OccName
 import qualified TysWiredIn
 import qualified Bag
 import qualified DynFlags
 import qualified SrcLoc
 import qualified OccName
 import qualified TysWiredIn
 import qualified Bag
 import qualified DynFlags
 import qualified SrcLoc

+import qualified CoreSyn
+import qualified Var
+import qualified VarSet
+import qualified Unique
+import qualified CoreUtils
+import qualified CoreFVs

 
 import GhcTools
 import HsTools
 
 import GhcTools
 import HsTools


@@ -46,7 +56,7 @@ eval_tfp_int ty =
     core <- toCore modules expr
     execCore core 
 
     core <- toCore modules expr
     execCore core 
 

--- | Get the length of a SizedWord type
+-- | Get the width of a SizedWord type

 sized_word_len :: Type.Type -> Int
 sized_word_len ty =
   eval_tfp_int len
 sized_word_len :: Type.Type -> Int
 sized_word_len ty =
   eval_tfp_int len


@@ -56,16 +66,64 @@ sized_word_len ty =
 
 -- | Evaluate a core Type representing type level int from the TypeLevel
 -- library to a real int.
 
 -- | Evaluate a core Type representing type level int from the TypeLevel
 -- library to a real int.

-eval_type_level_int :: Type.Type -> Int
-eval_type_level_int ty =
-  unsafeRunGhc $ do
-    -- Automatically import modules for any fully qualified identifiers
-    setDynFlag DynFlags.Opt_ImplicitImportQualified
+-- eval_type_level_int :: Type.Type -> Int
+-- eval_type_level_int ty =
+--   unsafeRunGhc $ do
+--     -- Automatically import modules for any fully qualified identifiers
+--     setDynFlag DynFlags.Opt_ImplicitImportQualified
+-- 
+--     let to_int_name = mkRdrName "Data.TypeLevel.Num.Sets" "toInt"
+--     let to_int = SrcLoc.noLoc $ HsExpr.HsVar to_int_name
+--     let undef = hsTypedUndef $ coreToHsType ty
+--     let app = HsExpr.HsApp (to_int) (undef)
+-- 
+--     core <- toCore [] app
+--     execCore core 

 
 

-    let to_int_name = mkRdrName "Data.TypeLevel.Num.Sets" "toInt"
-    let to_int = SrcLoc.noLoc $ HsExpr.HsVar to_int_name
-    let undef = hsTypedUndef $ coreToHsType ty
-    let app = HsExpr.HsApp (to_int) (undef)
+-- | Get the length of a FSVec type
+tfvec_len :: Type.Type -> Int
+tfvec_len ty =
+  eval_tfp_int len
+  where 
+    (tycon, args) = Type.splitTyConApp ty
+    [len, el_ty] = args

 
 

-    core <- toCore [] app
-    execCore core 
+-- Is this a wild binder?
+is_wild :: CoreSyn.CoreBndr -> Bool
+-- wild binders have a particular unique, that we copied from MkCore.lhs to
+-- here. However, this comparison didn't work, so we'll just check the
+-- occstring for now... TODO
+--(Var.varUnique bndr) == (Unique.mkBuiltinUnique 1)
+is_wild bndr = "wild" == (OccName.occNameString . Name.nameOccName . Var.varName) bndr
+
+-- Is the given core expression a lambda abstraction?
+is_lam :: CoreSyn.CoreExpr -> Bool
+is_lam (CoreSyn.Lam _ _) = True
+is_lam _ = False
+
+-- Is the given core expression of a function type?
+is_fun :: CoreSyn.CoreExpr -> Bool
+-- Treat Type arguments differently, because exprType is not defined for them.
+is_fun (CoreSyn.Type _) = False
+is_fun expr = (Type.isFunTy . CoreUtils.exprType) expr
+
+-- Is the given core expression polymorphic (i.e., does it accept type
+-- arguments?).
+is_poly :: CoreSyn.CoreExpr -> Bool
+-- Treat Type arguments differently, because exprType is not defined for them.
+is_poly (CoreSyn.Type _) = False
+is_poly expr = (Maybe.isJust . Type.splitForAllTy_maybe . CoreUtils.exprType) expr
+
+-- Is the given core expression a variable reference?
+is_var :: CoreSyn.CoreExpr -> Bool
+is_var (CoreSyn.Var _) = True
+is_var _ = False
+
+-- Can the given core expression be applied to something? This is true for
+-- applying to a value as well as a type.
+is_applicable :: CoreSyn.CoreExpr -> Bool
+is_applicable expr = is_fun expr || is_poly expr
+
+-- Does the given CoreExpr have any free type vars?
+has_free_tyvars :: CoreSyn.CoreExpr -> Bool
+has_free_tyvars = not . VarSet.isEmptyVarSet . (CoreFVs.exprSomeFreeVars Var.isTyVar)