optional semi-colons

SVN=123245

src/cmd/gc/go.y

@@ -33,7 +33,7 @@
 %type	<node>		else_stmt1 else_stmt2
 %type	<node>		complex_stmt compound_stmt ostmt_list
 %type	<node>		stmt_list_r Astmt_list_r Bstmt_list_r
-%type	<node>		Astmt Bstmt Cstmt
+%type	<node>		Astmt Bstmt Cstmt Dstmt
 %type	<node>		for_stmt for_body for_header
 %type	<node>		if_stmt if_body if_header
 %type	<node>		range_header range_body range_stmt
@@ -314,10 +314,6 @@ complex_stmt:
 		poptodcl();
 		$$ = nod(OXCASE, N, N);
 	}
-|	new_name ':'
-	{
-		$$ = nod(OLABEL, $1, N);
-	}
 
 semi_stmt:
 	LFALL
@@ -1101,31 +1097,49 @@ Cstmt:
 	simple_stmt
 
 /*
- * statement list that need semi in back  NO
+ * need semi in front YES
+ * need semi in back  NO
+ */
+Dstmt:
+	new_name ':'
+	{
+		$$ = nod(OLABEL, $1, N);
+	}
+
+/*
+ * statement list that ends AorD
  */
 Astmt_list_r:
 	Astmt
+|	Dstmt
 |	Astmt_list_r Astmt
 	{
 		$$ = nod(OLIST, $1, $2);
 	}
-|	Bstmt_list_r ';'
+|	Astmt_list_r Dstmt
+	{
+		$$ = nod(OLIST, $1, $2);
+	}
+|	Bstmt_list_r Astmt
+	{
+		$$ = nod(OLIST, $1, $2);
+	}
 
 /*
- * statement list that need semi in back  YES
+ * statement list that ends BorC
  */
 Bstmt_list_r:
 	Bstmt
 |	Cstmt
-|	Bstmt_list_r Bstmt
+|	Astmt_list_r Bstmt
 	{
 		$$ = nod(OLIST, $1, $2);
 	}
-|	Astmt_list_r Bstmt
+|	Astmt_list_r Cstmt
 	{
 		$$ = nod(OLIST, $1, $2);
 	}
-|	Astmt_list_r Cstmt
+|	Bstmt_list_r Bstmt
 	{
 		$$ = nod(OLIST, $1, $2);
 	}