From: Matthias Braun <matze@braunis.de>
Date: Thu, 8 Feb 2007 14:51:05 +0000 (+0000)
Subject: never set the startblock to bad (even without the self-referencing loop)
X-Git-Url: http://nsz.repo.hu/git/?a=commitdiff_plain;ds=sidebyside;h=ec00dc39006d2f664d4a20ed4f5cb70c21015f99;p=libfirm

never set the startblock to bad (even without the self-referencing loop)

[r8612]
---

diff --git a/ir/ir/iropt.c b/ir/ir/iropt.c
index 8adb26c32..dcc0a9061 100644
--- a/ir/ir/iropt.c
+++ b/ir/ir/iropt.c
@@ -3811,7 +3811,13 @@ static INLINE ir_node *gigo(ir_node *node)
         if (!is_Bad(get_irn_n(block, i)))
           break;
       }
-      if (i == irn_arity) return new_Bad();
+      if (i == irn_arity) {
+        ir_graph *irg = get_irn_irg(block);
+        /* the start block is never dead */
+        if(block != get_irg_start_block(irg)
+		   && block != get_irg_end_block(irg))
+          return new_Bad();
+      }
     }
   }