expr.c (convert_move): If unsignedp is less then zero there is no equivalent code.

	* expr.c (convert_move): If unsignedp is less then zero there
	is no equivalent code.

From-SVN: r58502

gcc/ChangeLog

+2002-10-24  Steve Ellcey  <sje@cup.hp.com>
+
+	* expr.c (convert_move): If unsignedp is less then zero there
+	is no equivalent code.
+
 2002-10-24  Zack Weinberg  <zack@codesourcery.com>
 
 	* tree.def: Delete mention of nonexistent ARRAY_TYPE fields.

gcc/expr.c

@@ -552,7 +552,8 @@ convert_move (to, from, unsignedp)
   rtx libcall;
 
   /* rtx code for making an equivalent value.  */
-  enum rtx_code equiv_code = (unsignedp ? ZERO_EXTEND : SIGN_EXTEND);
+  enum rtx_code equiv_code = (unsignedp < 0 ? UNKNOWN
+			      : (unsignedp ? ZERO_EXTEND : SIGN_EXTEND));
 
   to = protect_from_queue (to, 1);
   from = protect_from_queue (from, 0);