convert.c (convert_to_integer): Fix compare for nonpositive constant to use tree_int_cst_sgn <= 0.

2005-12-02  Richard Guenther  <rguenther@suse.de>

        * convert.c (convert_to_integer): Fix compare for nonpositive
        constant to use tree_int_cst_sgn <= 0.

From-SVN: r107882

gcc/ChangeLog

 2005-12-02  Richard Guenther  <rguenther@suse.de>
 
+	* convert.c (convert_to_integer): Fix compare for nonpositive
+	constant to use tree_int_cst_sgn <= 0.
+
+2005-12-02  Richard Guenther  <rguenther@suse.de>
+
 	* convert.c (convert_to_integer): Use fold_convert instead
 	of fold_build1 (NOP_EXPR, ...).  Use tree_int_cst_sgn < 0
 	instead of comparing against 0.  Use build_int_cst instead

gcc/convert.c

@@ -500,7 +500,7 @@ convert_to_integer (tree type, tree expr)
 	  /* We can pass truncation down through right shifting
 	     when the shift count is a nonpositive constant.  */
 	  if (TREE_CODE (TREE_OPERAND (expr, 1)) == INTEGER_CST
-	      && tree_int_cst_sgn (TREE_OPERAND (expr, 1)) < 0)
+	      && tree_int_cst_sgn (TREE_OPERAND (expr, 1)) <= 0)
 	    goto trunc1;
 	  break;