Added a warning if the result of a compare operation is constant. This should

protect against missing parenthesis like in (si & 0x7F == 0). Hopefully
without too many false positives.


git-svn-id: svn://svn.cc65.org/cc65/trunk@4057 b7a2c559-68d2-44c3-8de9-860c34a00d81

src/cc65/expr.c

@@ -1885,6 +1885,8 @@ static void hie_compare (const GenDesc* Ops,    /* List of generators */
 	/* Check for const operands */
 	if (ED_IsConstAbs (Expr) && rconst) {
 
+            Warning ("Result of comparison is constant");
+
        	    /* Both operands are constant, remove the generated code */
        	    RemoveCode (&Mark1);