cast function generated output stability

- cast functions in separate scopes are no longer omitted or removed
- package item reordering excludes locally declared names
- test runner ensures output is stable after first iteration

src/Convert/Package.hs

@@ -442,10 +442,36 @@ addUsedPIs :: ModuleItem -> (ModuleItem, Idents)
 addUsedPIs item =
     (item, usedPIs)
     where
-        usedPIs = execWriter $
-            traverseNestedModuleItemsM (traverseIdentsM writeIdent) item
-        writeIdent :: Identifier -> Writer Idents Identifier
-        writeIdent x = tell (Set.singleton x) >> return x
+        usedPIs = execWriter $ evalScoperT
+            writeDeclIdents writeModuleItemIdents writeGenItemIdents writeStmtIdents
+            "" [item]
+
+type IdentWriter = ScoperT () (Writer Idents)
+
+writeDeclIdents :: Decl -> IdentWriter Decl
+writeDeclIdents decl = do
+    case decl of
+        Variable _ _ x _ _ -> insertElem x ()
+        Param    _ _ x   _ -> insertElem x ()
+        ParamType  _ x   _ -> insertElem x ()
+        CommentDecl{} -> return ()
+    traverseDeclIdentsM writeIdent decl
+
+writeModuleItemIdents :: ModuleItem -> IdentWriter ModuleItem
+writeModuleItemIdents = traverseIdentsM writeIdent
+
+writeGenItemIdents :: GenItem -> IdentWriter GenItem
+writeGenItemIdents =
+    traverseGenItemExprsM $ traverseExprIdentsM writeIdent
+
+writeStmtIdents :: Stmt -> IdentWriter Stmt
+writeStmtIdents = traverseStmtIdentsM writeIdent
+
+writeIdent :: Identifier -> IdentWriter Identifier
+writeIdent x = do
+    details <- lookupElemM x
+    when (details == Nothing) $ tell (Set.singleton x)
+    return x
 
 -- visits all identifiers in a module item
 traverseIdentsM :: Monad m => MapperM m Identifier -> MapperM m ModuleItem

src/Convert/SizeCast.hs

@@ -27,7 +27,7 @@ traverseDeclM :: Decl -> Scoper Type Decl
 traverseDeclM decl = do
     decl' <- case decl of
         Variable _ t x _ _ -> do
-            details <- lookupElemM x
+            details <- lookupLocalIdentM x
             if isPrefixOf "sv2v_cast_" x && details /= Nothing
                 then return $ Variable Local t DuplicateTag [] Nil
                 else insertElem x t >> return decl
@@ -122,7 +122,7 @@ traverseExprM =
             return $ Number $ Decimal (fromIntegral size) True val'
             where val' = val `mod` (2 ^ size)
         convertCastWithSigningM s e sg = do
-            details <- lookupElemM $ castFnName s sg
+            details <- lookupLocalIdentM $ castFnName s sg
             when (details == Nothing) $ injectItem $ MIPackageItem $ castFn s sg
             let f = castFnName s sg
             let args = Args [e] []

test/basic/cast_conflict.sv

@@ -0,0 +1,11 @@
+module top;
+    parameter CONST = 1;
+    localparam WIDTH = CONST * 2;
+    localparam VALUE = WIDTH'(1'sb1);
+    initial $display("%b", VALUE);
+    if (1) begin : blk2
+        localparam WIDTH = CONST * 3;
+        localparam VALUE = WIDTH'(1'sb1);
+        initial $display("%b", VALUE);
+    end
+endmodule

test/basic/cast_conflict.v

@@ -0,0 +1,8 @@
+module top;
+    initial $display("%b", 2'b11);
+    generate
+        if (1) begin : blk2
+            initial $display("%b", 3'b111);
+        end
+    endgenerate
+endmodule

test/basic/function_reorder_resolve.sv

@@ -0,0 +1,15 @@
+module top;
+    parameter YES = 1;
+    if (YES) begin
+        function automatic [31:0] help;
+            input [31:0] inp;
+            help = inp + 1;
+        endfunction
+        initial $display("A %0d", help(0));
+    end
+    function automatic [31:0] help;
+        input [31:0] inp;
+        help = inp + 2;
+    endfunction
+    initial $display("B %0d", help(0));
+endmodule

test/lib/functions.sh

@@ -51,13 +51,8 @@ assertConverts() {
     ac_tmpb=$SHUNIT_TMPDIR/ac-conv-tmpb.v
     $SV2V $ac_tmpa 2> /dev/null > $ac_tmpb
     assertTrue "2nd conversion of $ac_file failed" $?
-    if [ -n "$(diff $ac_tmpa $ac_tmpb)" ]; then
-        ac_tmpc=$SHUNIT_TMPDIR/ac-conv-tmpc.v
-        $SV2V $ac_tmpb 2> /dev/null > $ac_tmpc
-        assertTrue "3rd conversion of $ac_file failed" $?
-        diff $ac_tmpb $ac_tmpc > /dev/null
-        assertTrue "conversion of $ac_file not stable after the second iteration" $?
-    fi
+    diff $ac_tmpa $ac_tmpb > /dev/null
+    assertTrue "conversion of $ac_file not stable after the first iteration" $?
     $SV2V -v $ac_file 2> /dev/null > /dev/null
     assertTrue "verbose conversion of $ac_file failed" $?
     # using sed to remove quoted strings