-transforms = [argproptop, funextracttop, etatop, betatop, castproptop, letremovetop, letrectop, letsimpltop, letflattop, casewildtop, scrutsimpltop, casevalsimpltop, caseremovetop, inlinenonreptop, appsimpltop]
-
--- Turns the given bind into VHDL
-normalizeModule ::
- HscTypes.HscEnv
- -> UniqSupply.UniqSupply -- ^ A UniqSupply we can use
- -> [(CoreBndr, CoreExpr)] -- ^ All bindings we know (i.e., in the current module)
- -> [CoreBndr] -- ^ The bindings to generate VHDL for (i.e., the top level bindings)
- -> [Bool] -- ^ For each of the bindings to generate VHDL for, if it is stateful
- -> ([(CoreBndr, CoreExpr)], TypeState) -- ^ The resulting VHDL
-
-normalizeModule env uniqsupply bindings generate_for statefuls = runTransformSession env uniqsupply $ do
- -- Put all the bindings in this module in the tsBindings map
- putA tsBindings (Map.fromList bindings)
- -- (Recursively) normalize each of the requested bindings
- mapM normalizeBind generate_for
- -- Get all initial bindings and the ones we produced
- bindings_map <- getA tsBindings
- let bindings = Map.assocs bindings_map
- normalized_bindings <- getA tsNormalized
- typestate <- getA tsType
- -- But return only the normalized bindings
- return $ (filter ((flip VarSet.elemVarSet normalized_bindings) . fst) bindings, typestate)
-
-normalizeBind :: CoreBndr -> TransformSession ()
-normalizeBind bndr =
- -- Don't normalize global variables, these should be either builtin
- -- functions or data constructors.
- Monad.when (Var.isLocalId bndr) $ do
- -- Skip binders that have a polymorphic type, since it's impossible to
- -- create polymorphic hardware.
- if is_poly (Var bndr)
- then
- -- This should really only happen at the top level... TODO: Give
- -- a different error if this happens down in the recursion.
- error $ "\nNormalize.normalizeBind: Function " ++ show bndr ++ " is polymorphic, can't normalize"
- else do
- normalized_funcs <- getA tsNormalized
- -- See if this function was normalized already
- if VarSet.elemVarSet bndr normalized_funcs
- then
- -- Yup, don't do it again
- return ()
- else do
- -- Nope, note that it has been and do it.
- modA tsNormalized (flip VarSet.extendVarSet bndr)
- expr_maybe <- getGlobalBind bndr
- case expr_maybe of
- Just expr -> do
- -- Introduce an empty Let at the top level, so there will always be
- -- a let in the expression (none of the transformations will remove
- -- the last let).
- let expr' = Let (Rec []) expr
- -- Normalize this expression
- trace ("Transforming " ++ (show bndr) ++ "\nBefore:\n\n" ++ showSDoc ( ppr expr' ) ++ "\n") $ return ()
- expr' <- dotransforms transforms expr'
- trace ("\nAfter:\n\n" ++ showSDoc ( ppr expr')) $ return ()
- -- And store the normalized version in the session
- modA tsBindings (Map.insert bndr expr')
- -- Find all vars used with a function type. All of these should be global
- -- binders (i.e., functions used), since any local binders with a function
- -- type should have been inlined already.
- bndrs <- getGlobalBinders
- let used_funcs_set = CoreFVs.exprSomeFreeVars (\v -> not (Id.isDictId v) && v `elem` bndrs) expr'
- let used_funcs = VarSet.varSetElems used_funcs_set
- -- Process each of the used functions recursively
- mapM normalizeBind used_funcs
- return ()
- -- We don't have a value for this binder. This really shouldn't
- -- happen for local id's...
- Nothing -> error $ "\nNormalize.normalizeBind: No value found for binder " ++ pprString bndr ++ "? This should not happen!"
+transforms = [argproptop, funextracttop, etatop, betatop, castproptop, letremovetop, letrectop, letsimpltop, letflattop, scrutsimpltop, casesimpltop, caseremovetop, inlinenonreptop, appsimpltop, letremoveunusedtop, castsimpltop]
+
+-- | Returns the normalized version of the given function.
+getNormalized ::
+ CoreBndr -- ^ The function to get
+ -> TranslatorSession CoreExpr -- The normalized function body
+
+getNormalized bndr = Utils.makeCached bndr tsNormalized $ do
+ if is_poly (Var bndr)
+ then
+ -- This should really only happen at the top level... TODO: Give
+ -- a different error if this happens down in the recursion.
+ error $ "\nNormalize.normalizeBind: Function " ++ show bndr ++ " is polymorphic, can't normalize"
+ else do
+ expr <- getBinding bndr
+ normalizeExpr (show bndr) expr
+
+-- | Normalize an expression
+normalizeExpr ::
+ String -- ^ What are we normalizing? For debug output only.
+ -> CoreSyn.CoreExpr -- ^ The expression to normalize
+ -> TranslatorSession CoreSyn.CoreExpr -- ^ The normalized expression
+
+normalizeExpr what expr = do
+ -- Introduce an empty Let at the top level, so there will always be
+ -- a let in the expression (none of the transformations will remove
+ -- the last let).
+ let expr' = Let (Rec []) expr
+ -- Normalize this expression
+ trace ("Transforming " ++ what ++ "\nBefore:\n\n" ++ showSDoc ( ppr expr' ) ++ "\n") $ return ()
+ expr'' <- dotransforms transforms expr'
+ trace ("\nAfter:\n\n" ++ showSDoc ( ppr expr'')) $ return ()
+ return expr''
+
+-- | Get the value that is bound to the given binder at top level. Fails when
+-- there is no such binding.
+getBinding ::
+ CoreBndr -- ^ The binder to get the expression for
+ -> TranslatorSession CoreExpr -- ^ The value bound to the binder
+
+getBinding bndr = Utils.makeCached bndr tsBindings $ do
+ -- If the binding isn't in the "cache" (bindings map), then we can't create
+ -- it out of thin air, so return an error.
+ error $ "Normalize.getBinding: Unknown function requested: " ++ show bndr