From de7273208025747b993d8f74463ac7ee2ba993f8 Mon Sep 17 00:00:00 2001
From: Michael Beck <beck@ipd.info.uni-karlsruhe.de>
Date: Mon, 29 Nov 2004 10:48:50 +0000
Subject: [PATCH] needed is_Bad check

[r4490]
---
 ir/ir/iropt.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ir/ir/iropt.c b/ir/ir/iropt.c
index 60ad50ea6..ce100503c 100644
--- a/ir/ir/iropt.c
+++ b/ir/ir/iropt.c
@@ -97,7 +97,7 @@ static tarval *computed_value_Sub(ir_node *n)
   tarval *tb;
 
   /* a - a */
-  if (a == b)
+  if (a == b && !is_Bad(a))
     return get_tarval_null(get_irn_mode(n));
 
   ta = value_of(a);
-- 
2.20.1