support for generate constructs outside of generate regions and genvar declarations in generate loops

src/Convert/Traverse.hs

@@ -557,11 +557,11 @@ traverseExprsM' strat exprMapper = moduleItemMapper
         a'' <- traverseAssertionExprsM exprMapper a'
         return $ AssertionItem (mx, a'')
 
-    genItemMapper (GenFor (x1, e1) cc (x2, op2, e2) mn subItems) = do
+    genItemMapper (GenFor (n1, x1, e1) cc (x2, op2, e2) mn subItems) = do
         e1' <- exprMapper e1
         e2' <- exprMapper e2
         cc' <- exprMapper cc
-        return $ GenFor (x1, e1') cc' (x2, op2, e2') mn subItems
+        return $ GenFor (n1, x1, e1') cc' (x2, op2, e2') mn subItems
     genItemMapper (GenIf e i1 i2) = do
         e' <- exprMapper e
         return $ GenIf e' i1 i2

src/Language/SystemVerilog/AST/GenItem.hs

@@ -22,7 +22,7 @@ import {-# SOURCE #-} Language.SystemVerilog.AST.ModuleItem (ModuleItem)
 data GenItem
     = GenBlock (Maybe Identifier) [GenItem]
     | GenCase  Expr [GenCase] (Maybe GenItem)
-    | GenFor   (Identifier, Expr) Expr (Identifier, AsgnOp, Expr) (Maybe Identifier) [GenItem]
+    | GenFor   (Bool, Identifier, Expr) Expr (Identifier, AsgnOp, Expr) (Maybe Identifier) [GenItem]
     | GenIf    Expr GenItem GenItem
     | GenNull
     | GenModuleItem ModuleItem
@@ -40,8 +40,9 @@ instance Show GenItem where
             (maybe "" (indent . indent . show) md)
     show (GenIf e a GenNull) = printf "if (%s) %s"          (show e) (show a)
     show (GenIf e a b      ) = printf "if (%s) %s\nelse %s" (show e) (show a) (show b)
-    show (GenFor (x1, e1) c (x2, o2, e2) mx is) =
-        printf "for (%s = %s; %s; %s %s %s) %s"
+    show (GenFor (new, x1, e1) c (x2, o2, e2) mx is) =
+        printf "for (%s%s = %s; %s; %s %s %s) %s"
+            (if new then "genvar " else "")
             x1 (show e1)
             (show c)
             x2 (show o2) (show e2)

src/Language/SystemVerilog/Parser/Parse.y

@@ -432,6 +432,11 @@ ModuleItems :: { [ModuleItem] }
   | ModuleItems ";"        { $1 }
 
 ModuleItem :: { [ModuleItem] }
+  : NonGenerateModuleItem { $1 }
+  | ConditionalGenerateConstruct      { [Generate [$1]] }
+  | LoopGenerateConstruct             { [Generate [$1]] }
+  | "generate" GenItems "endgenerate" { [Generate $2] }
+NonGenerateModuleItem :: { [ModuleItem] }
   -- This item covers module instantiations and all declarations
   : DeclTokens(";")  { parseDTsAsModuleItems $1 }
   | ParameterDecl(ParameterDeclKW, ";")  { map MIDecl $1 }
@@ -440,7 +445,6 @@ ModuleItem :: { [ModuleItem] }
   | AlwaysKW Stmt                        { [AlwaysC $1 $2] }
   | "initial" Stmt                       { [Initial $2] }
   | "genvar" Identifiers ";"             { map Genvar $2 }
-  | "generate" GenItems "endgenerate"    { [Generate $2] }
   | "modport" ModportItems ";"           { map (uncurry Modport) $2 }
   | PackageItem                          { [MIPackageItem $1] }
   | NInputGateKW  NInputGates  ";"       { map (\(a, b, c) -> NInputGate  $1 a b c) $2 }
@@ -859,12 +863,16 @@ GenItems :: { [GenItem] }
   | GenItems GenItem { $1 ++ [$2] }
 
 GenItem :: { GenItem }
+  : GenBlock              { uncurry GenBlock $1 }
+  | NonGenerateModuleItem { genItemsToGenItem $ map GenModuleItem $1 }
+  | ConditionalGenerateConstruct { $1 }
+  | LoopGenerateConstruct        { $1 }
+ConditionalGenerateConstruct :: { GenItem }
   : "if" "(" Expr ")" GenItemOrNull "else" GenItemOrNull { GenIf $3 $5 $7      }
   | "if" "(" Expr ")" GenItemOrNull %prec NoElse         { GenIf $3 $5 GenNull }
-  | GenBlock                                             { uncurry GenBlock $1 }
   | "case" "(" Expr ")" GenCases opt(GenCaseDefault) "endcase" { GenCase $3 $5 $6 }
-  | "for" "(" Identifier "=" Expr ";" Expr ";" GenvarIteration ")" GenBlock { (uncurry $ GenFor ($3, $5) $7 $9) $11  }
-  | ModuleItem { genItemsToGenItem $ map GenModuleItem $1 }
+LoopGenerateConstruct :: { GenItem }
+  : "for" "(" GenvarInitialization ";" Expr ";" GenvarIteration ")" GenBlock { (uncurry $ GenFor $3 $5 $7) $9 }
 
 GenBlock :: { (Maybe Identifier, [GenItem]) }
   : "begin" opt(Tag) GenItems "end" opt(Tag) { (combineTags $2 $5, $3) }
@@ -879,6 +887,10 @@ GenCase :: { GenCase }
 GenCaseDefault :: { GenItem }
   : "default" opt(":") GenItemOrNull { $3 }
 
+GenvarInitialization :: { (Bool, Identifier, Expr) }
+  : "genvar" Identifier "=" Expr { (True , $2, $4) }
+  |          Identifier "=" Expr { (False, $1, $3) }
+
 GenvarIteration :: { (Identifier, AsgnOp, Expr) }
   : Identifier AsgnOp Expr { ($1, $2, $3) }
   | IncOrDecOperator Identifier { ($2, AsgnOp $1, Number "1") }