explicit decl type and expr traversals

- fix int type conversion not visiting function return type expressions
- add node-based traversal for decls visiting top level types and exprs
- explicit expr and type recursion in package ident resolution
- expose mapBothM traversal helper
- avoid double-visiting of decl types in certain conversions

src/Convert/IntTypes.hs

@@ -13,9 +13,26 @@ convert :: [AST] -> [AST]
 convert = map $ traverseDescriptions $ traverseModuleItems convertModuleItem
 
 convertModuleItem :: ModuleItem -> ModuleItem
-convertModuleItem =
-    traverseTypes (traverseNestedTypes convertType) .
-    traverseExprs (traverseNestedExprs convertExpr)
+convertModuleItem = traverseNodes
+    traverseExpr traverseDecl traverseType traverseLHS traverseStmt
+    where
+        traverseDecl = traverseDeclNodes traverseType traverseExpr
+        traverseLHS = traverseNestedLHSs $ traverseLHSExprs traverseExpr
+        traverseStmt = traverseNestedStmts $
+            traverseStmtDecls (traverseDeclNodes traverseType id) .
+            traverseStmtExprs traverseExpr
+
+traverseType :: Type -> Type
+traverseType =
+    traverseSinglyNestedTypes traverseType .
+    traverseTypeExprs traverseExpr .
+    convertType
+
+traverseExpr :: Expr -> Expr
+traverseExpr =
+    traverseSinglyNestedExprs traverseExpr .
+    traverseExprTypes traverseType .
+    convertExpr
 
 convertType :: Type -> Type
 convertType (Struct pk fields rs) =

src/Convert/Package.hs

@@ -310,8 +310,7 @@ processItems topName packageName moduleItems = do
 
         traverseDeclM :: Decl -> Scope Decl
         traverseDeclM decl = do
-            decl' <- traverseDeclTypesM traverseTypeM decl
-                    >>= traverseDeclExprsM traverseExprM
+            decl' <- traverseDeclNodesM traverseTypeM traverseExprM decl
             case decl' of
                 Variable d t x a e -> declHelp x $ \x' -> Variable d t x' a e
                 Net  d n s t x a e -> declHelp x $ \x' -> Net  d n s t x' a e
@@ -320,21 +319,36 @@ processItems topName packageName moduleItems = do
                 CommentDecl c -> return $ CommentDecl c
             where declHelp x f = prefixIdent x >>= return . f
 
+        traverseRangeM :: Range -> Scope Range
+        traverseRangeM = mapBothM traverseExprM
+
+        traverseEnumItemM :: (Identifier, Expr) -> Scope (Identifier, Expr)
+        traverseEnumItemM (x, e) = do
+            x' <- prefixIdent x
+            e' <- traverseExprM e
+            return (x', e')
+
         traverseTypeM :: Type -> Scope Type
         traverseTypeM (CSAlias p b x rs) = do
             x' <- resolveCSIdent' p b x
-            return $ Alias x' rs
+            rs' <- mapM traverseRangeM rs
+            return $ Alias x' rs'
         traverseTypeM (PSAlias p x rs) = do
             x' <- resolvePSIdent' p x
-            return $ Alias x' rs
-        traverseTypeM (Alias x rs) =
-            resolveIdent x >>= \x' -> return $ Alias x' rs
+            rs' <- mapM traverseRangeM rs
+            return $ Alias x' rs'
+        traverseTypeM (Alias x rs) = do
+            rs' <- mapM traverseRangeM rs
+            x' <- resolveIdent x
+            return $ Alias x' rs'
         traverseTypeM (Enum t enumItems rs) = do
             t' <- traverseTypeM t
-            enumItems' <- mapM prefixEnumItem enumItems
-            return $ Enum t' enumItems' rs
-            where prefixEnumItem (x, e) = prefixIdent x >>= \x' -> return (x', e)
-        traverseTypeM other = traverseSinglyNestedTypesM traverseTypeM other
+            enumItems' <- mapM traverseEnumItemM enumItems
+            rs' <- mapM traverseRangeM rs
+            return $ Enum t' enumItems' rs'
+        traverseTypeM other =
+            traverseSinglyNestedTypesM traverseTypeM other
+            >>= traverseTypeExprsM traverseExprM
 
         traverseExprM :: Expr -> Scope Expr
         traverseExprM (CSIdent p b x) = do
@@ -344,7 +358,9 @@ processItems topName packageName moduleItems = do
             x' <- resolvePSIdent' p x
             return $ Ident x'
         traverseExprM (Ident x) = resolveIdent x >>= return . Ident
-        traverseExprM other = traverseSinglyNestedExprsM traverseExprM other
+        traverseExprM other =
+            traverseSinglyNestedExprsM traverseExprM other
+            >>= traverseExprTypesM traverseTypeM
 
         traverseLHSM :: LHS -> Scope LHS
         traverseLHSM (LHSIdent x) = resolveIdent x >>= return . LHSIdent
@@ -735,9 +751,9 @@ traverseStmtIdentsM identMapper = fullMapper
 
 -- visits all identifiers in a declaration
 traverseDeclIdentsM :: Monad m => MapperM m Identifier -> MapperM m Decl
-traverseDeclIdentsM identMapper =
-    traverseDeclExprsM (traverseExprIdentsM identMapper) >=>
-    traverseDeclTypesM (traverseTypeIdentsM identMapper)
+traverseDeclIdentsM identMapper = traverseDeclNodesM
+    (traverseTypeIdentsM identMapper)
+    (traverseExprIdentsM identMapper)
 
 -- returns any names defined by a package item
 piNames :: PackageItem -> [Identifier]

src/Convert/ParamType.hs

@@ -142,8 +142,7 @@ convert files =
                                     then Parameter
                                     else Localparam
                 rewriteDecl other =
-                    traverseDeclTypes rewriteType $
-                    traverseDeclExprs rewriteExpr other
+                    traverseDeclNodes rewriteType rewriteExpr other
                 additionalParamItems = concatMap makeAddedParams $
                     Map.toList $ Map.map snd inst
                 rewriteExpr :: Expr -> Expr

src/Convert/Traverse.hs

@@ -10,6 +10,7 @@ module Convert.Traverse
 , CollectorM
 , unmonad
 , collectify
+, mapBothM
 , traverseDescriptionsM
 , traverseDescriptions
 , collectDescriptionsM
@@ -54,6 +55,8 @@ module Convert.Traverse
 , traverseGenItemExprsM
 , traverseGenItemExprs
 , collectGenItemExprsM
+, traverseDeclNodesM
+, traverseDeclNodes
 , traverseDeclExprsM
 , traverseDeclExprs
 , collectDeclExprsM
@@ -531,7 +534,7 @@ traverseExprsM :: Monad m => MapperM m Expr -> MapperM m ModuleItem
 traverseExprsM exprMapper =
     traverseNodesM exprMapper declMapper typeMapper lhsMapper stmtMapper
     where
-    declMapper = traverseDeclExprsM exprMapper
+    declMapper = traverseDeclNodesM typeMapper exprMapper
     typeMapper = traverseNestedTypesM (traverseTypeExprsM exprMapper)
     lhsMapper = traverseNestedLHSsM (traverseLHSExprsM exprMapper)
     stmtMapper = traverseNestedStmtsM (traverseStmtExprsM exprMapper)
@@ -935,12 +938,11 @@ traverseGenItemExprs = unmonad traverseGenItemExprsM
 collectGenItemExprsM :: Monad m => CollectorM m Expr -> CollectorM m GenItem
 collectGenItemExprsM = collectify traverseGenItemExprsM
 
-traverseDeclExprsM :: Monad m => MapperM m Expr -> MapperM m Decl
-traverseDeclExprsM exprMapper =
+traverseDeclNodesM
+    :: Monad m => MapperM m Type -> MapperM m Expr -> MapperM m Decl
+traverseDeclNodesM typeMapper exprMapper =
     declMapper
     where
-        typeMapper = traverseNestedTypesM (traverseTypeExprsM exprMapper)
-
         declMapper (Param s t x e) = do
             t' <- typeMapper t
             e' <- exprMapper e
@@ -961,21 +963,24 @@ traverseDeclExprsM exprMapper =
         declMapper (CommentDecl c) =
             return $ CommentDecl c
 
+traverseDeclNodes :: Mapper Type -> Mapper Expr -> Mapper Decl
+traverseDeclNodes typeMapper exprMapper =
+    runIdentity . traverseDeclNodesM
+        (return . typeMapper)
+        (return . exprMapper)
+
+traverseDeclExprsM :: Monad m => MapperM m Expr -> MapperM m Decl
+traverseDeclExprsM exprMapper = traverseDeclNodesM typeMapper exprMapper
+    where typeMapper = traverseNestedTypesM (traverseTypeExprsM exprMapper)
+
 traverseDeclExprs :: Mapper Expr -> Mapper Decl
 traverseDeclExprs = unmonad traverseDeclExprsM
 collectDeclExprsM :: Monad m => CollectorM m Expr -> CollectorM m Decl
 collectDeclExprsM = collectify traverseDeclExprsM
 
 traverseDeclTypesM :: Monad m => MapperM m Type -> MapperM m Decl
-traverseDeclTypesM mapper (Param s t x e) =
-    mapper t >>= \t' -> return $ Param s t' x e
-traverseDeclTypesM mapper (ParamType s x t) =
-    mapper t >>= \t' -> return $ ParamType s x t'
-traverseDeclTypesM mapper (Variable d t x a e) =
-    mapper t >>= \t' -> return $ Variable d t' x a e
-traverseDeclTypesM mapper (Net d n s t x a e) =
-    mapper t >>= \t' -> return $ Net d n s t' x a e
-traverseDeclTypesM _ (CommentDecl c) = return $ CommentDecl c
+traverseDeclTypesM typeMapper = traverseDeclNodesM typeMapper exprMapper
+    where exprMapper = traverseNestedExprsM (traverseExprTypesM typeMapper)
 
 traverseDeclTypes :: Mapper Type -> Mapper Decl
 traverseDeclTypes = unmonad traverseDeclTypesM
@@ -990,8 +995,7 @@ traverseTypesM typeMapper =
         lhsMapper = traverseNestedLHSsM (traverseLHSExprsM exprMapper)
         stmtMapper = traverseNestedStmtsM $
             traverseStmtDeclsM declMapper >=> traverseStmtExprsM exprMapper
-        declMapper =
-            traverseDeclExprsM exprMapper >=> traverseDeclTypesM typeMapper
+        declMapper = traverseDeclNodesM typeMapper exprMapper
 
 traverseTypes :: Mapper Type -> Mapper ModuleItem
 traverseTypes = unmonad traverseTypesM

src/Convert/TypeOf.hs

@@ -44,8 +44,7 @@ traverseDeclM :: Decl -> ST Decl
 traverseDeclM decl @ Net{} =
     traverseNetAsVarM traverseDeclM decl
 traverseDeclM decl = do
-    decl' <- traverseDeclExprsM traverseExprM decl
-        >>= traverseDeclTypesM traverseTypeM
+    decl' <- traverseDeclNodesM traverseTypeM traverseExprM decl
     case decl' of
         Variable _ (Implicit sg rs) ident a _ ->
             -- implicit types, which are commonly found in function return

src/Convert/Typedef.hs

@@ -72,8 +72,7 @@ traverseGenItemM = traverseGenItemExprsM traverseExprM
 
 traverseDeclM :: Decl -> Scoper Type Decl
 traverseDeclM decl = do
-    decl' <- traverseDeclExprsM traverseExprM decl
-        >>= traverseDeclTypesM traverseTypeM
+    decl' <- traverseDeclNodesM traverseTypeM traverseExprM decl
     case decl' of
         Variable{} -> return decl'
         Net{} -> return decl'
@@ -110,7 +109,4 @@ traverseTypeM other =
     >>= traverseTypeExprsM traverseExprM
 
 traverseRangeM :: Range -> Scoper Type Range
-traverseRangeM (a, b) = do
-    a' <- traverseExprM a
-    b' <- traverseExprM b
-    return (a', b')
+traverseRangeM = mapBothM traverseExprM

test/core/function_range_cast.sv

@@ -0,0 +1,9 @@
+module top;
+    localparam type T = int unsigned;
+    wire [T'(32'sd32) - 1:0] x;
+    function automatic [T'(32'sd32) - 1:0] foo;
+        input reg [T'(32'sd32) - 1:0] inp;
+        foo = inp;
+    endfunction
+    assign x = foo(1'sb1);
+endmodule

test/core/function_range_cast.v

@@ -0,0 +1,3 @@
+module top;
+    wire [31:0] x = 1'sb1;
+endmodule