From: Matthijs Kooijman <m.kooijman@student.utwente.nl>
Date: Thu, 6 Aug 2009 14:20:51 +0000 (+0200)
Subject: Don't generate VHDL for state packing.
X-Git-Url: https://git.stderr.nl/gitweb?a=commitdiff_plain;h=fda239f0ae8fc6a2250e6719c3f564c9b2390c4a;p=matthijs%2Fmaster-project%2Fc%CE%BBash.git

Don't generate VHDL for state packing.
---

diff --git "a/c\316\273ash/CLasH/VHDL/Generate.hs" "b/c\316\273ash/CLasH/VHDL/Generate.hs"
index 5360cff..4de6b40 100644
--- "a/c\316\273ash/CLasH/VHDL/Generate.hs"
+++ "b/c\316\273ash/CLasH/VHDL/Generate.hs"
@@ -778,7 +778,7 @@ genApplication dst f args = do
           -- assignment here.
           f' <- MonadState.lift tsType $ varToVHDLExpr f
           return $ ([mkUncondAssign dst f'], [])
-    True ->
+    True | not stateful -> 
       case Var.idDetails f of
         IdInfo.DataConWorkId dc -> case dst of
           -- It's a datacon. Create a record from its arguments.
@@ -828,6 +828,16 @@ genApplication dst f args = do
                 error $ "\nGenerate.genApplication(ClassOpId): Incorrect number of arguments to builtin function: " ++ pprString f ++ " Args: " ++ show args
             Nothing -> error $ "\nGenerate.genApplication(ClassOpId): Using function from another module that is not a known builtin: " ++ pprString f
         details -> error $ "\nGenerate.genApplication: Calling unsupported function " ++ pprString f ++ " with GlobalIdDetails " ++ pprString details
+    -- If we can't generate a component instantiation, and the destination is
+    -- a state type, don't generate anything.
+    _ -> return ([], [])
+  where
+    -- Is our destination a state value?
+    stateful = case dst of
+      -- When our destination is a VHDL name, it won't have had a state type
+      Right _ -> False
+      -- Otherwise check its type
+      Left bndr -> hasStateType bndr
 
 -----------------------------------------------------------------------------
 -- Functions to generate functions dealing with vectors.