c-common.c (shorten_compare): Get the min/max value from the underlying type of an enumeration...

        * c-common.c (shorten_compare): Get the min/max value from the
        underlying type of an enumeration, not the enumerated type itself.

From-SVN: r25228

gcc/ChangeLog

+Tue Feb 16 01:37:33 1999  Charles G Waldman  <cgw@alum.mit.edu>
+
+	* c-common.c (shorten_compare): Get the min/max value from the
+	underlying type of an enumeration, not the enumerated type itself.
+
 Mon Feb 15 23:04:48 1999  Jeffrey A Law  (law@cygnus.com)
 
 	* jump.c: Include insn-attr.h.

gcc/c-common.c

@@ -2406,6 +2406,12 @@ shorten_compare (op0_ptr, op1_ptr, restype_ptr, rescode_ptr)
 
       type = signed_or_unsigned_type (unsignedp0, TREE_TYPE (primop0));
 
+      /* If TYPE is an enumeration, then we need to get its min/max
+	 values from it's underlying integral type, not the enumerated
+	 type itself.  */
+      if (TREE_CODE (type) == ENUMERAL_TYPE)
+	type = type_for_size (TYPE_PRECISION (type), unsignedp0);
+
       maxval = TYPE_MAX_VALUE (type);
       minval = TYPE_MIN_VALUE (type);