re PR target/20093 (23_containers/deque/cons/2.cc execution test fails on ia64-hpux, -milp32)

	PR target/20093
	* simplify-rtx.c (simplify_unary_operation_1): Check
	SUBREG_PROMOTED_UNSIGNED_P (op) > 0 for zero-extension.

From-SVN: r97775

gcc/ChangeLog

+2005-04-07  Joseph S. Myers  <joseph@codesourcery.com>
+
+	PR target/20093
+	* simplify-rtx.c (simplify_unary_operation_1): Check
+	SUBREG_PROMOTED_UNSIGNED_P (op) > 0 for zero-extension.
+
 2005-04-06  James E Wilson  <wilson@specifixinc.com>
 
 	PR target/20717

gcc/simplify-rtx.c

@@ -570,7 +570,7 @@ simplify_unary_operation_1 (enum rtx_code code, enum machine_mode mode, rtx op)
 	 target mode is the same as the variable's promotion.  */
       if (GET_CODE (op) == SUBREG
 	  && SUBREG_PROMOTED_VAR_P (op)
-	  && SUBREG_PROMOTED_UNSIGNED_P (op)
+	  && SUBREG_PROMOTED_UNSIGNED_P (op) > 0
 	  && GET_MODE (XEXP (op, 0)) == mode)
 	return XEXP (op, 0);