re PR rtl-optimization/23241 (Invalid code generated for comparison of uchar to 255)

	PR rtl-optimization/23241
	* combine.c (simplify_comparison): Fix error in determining
	whether to lift a subreg from comparison.

From-SVN: r102869

gcc/ChangeLog

+2005-08-08  Josh Conner  <jconner@apple.com>
+
+	PR rtl-optimization/23241
+	* combine.c (simplify_comparison): Fix error in determining
+	whether to lift a subreg from comparison.
+
 2005-08-08  David Edelsohn  <edelsohn@gnu.org>
 
 	PR target/18506

gcc/combine.c

@@ -10239,7 +10239,7 @@ simplify_comparison (enum rtx_code code, rtx *pop0, rtx *pop1)
 		      /* (A - C1) always sign-extends, like C2.  */
 		      && num_sign_bit_copies (a, inner_mode)
 			 > (unsigned int) (GET_MODE_BITSIZE (inner_mode)
-					   - mode_width - 1)))
+					   - (mode_width - 1))))
 		{
 		  op0 = SUBREG_REG (op0);
 		  continue;