From: Christian Würdig <chriswue@ipd.info.uni-karlsruhe.de>
Date: Tue, 6 Feb 2007 09:45:57 +0000 (+0000)
Subject: assert if someone tries to exchange a node with itself
X-Git-Url: http://nsz.repo.hu/git/?a=commitdiff_plain;h=ffe042333422649088689f15e96d684d2e09d408;p=libfirm

assert if someone tries to exchange a node with itself

[r8595]
---

diff --git a/ir/ir/irgmod.c b/ir/ir/irgmod.c
index b60424081..7d55d7a32 100644
--- a/ir/ir/irgmod.c
+++ b/ir/ir/irgmod.c
@@ -54,6 +54,7 @@ turn_into_tuple (ir_node *node, int arity)
 void
 exchange (ir_node *old, ir_node *nw)
 {
+  assert(old != nw && "Exchanging node with itself is not allowed");
   hook_replace(old, nw);
 
   /*