From: Christoph Mallon <christoph.mallon@gmx.de>
Date: Thu, 5 May 2011 16:47:40 +0000 (+0200)
Subject: Prevent endless recursion in if-conv in endless loops.
X-Git-Url: http://nsz.repo.hu/git/?a=commitdiff_plain;h=dc4ccc6cb47c9778f045288840965ab6e5e00933;hp=1ff0ced64d65a6a30aaa98fa5a7f34545df8a967;p=libfirm

Prevent endless recursion in if-conv in endless loops.
---

diff --git a/ir/opt/ifconv.c b/ir/opt/ifconv.c
index 04502fc45..b22c9db08 100644
--- a/ir/opt/ifconv.c
+++ b/ir/opt/ifconv.c
@@ -283,6 +283,8 @@ restart:
 		ir_cdep* cdep;
 
 		pred0 = get_Block_cfgpred_block(block, i);
+		if (pred0 == block) continue;
+
 		for (cdep = find_cdep(pred0); cdep != NULL; cdep = get_cdep_next(cdep)) {
 			const ir_node* dependency = get_cdep_node(cdep);
 			ir_node* projx0 = walk_to_projx(pred0, dependency);
@@ -310,6 +312,7 @@ restart:
 				dbg_info* cond_dbg;
 
 				pred1 = get_Block_cfgpred_block(block, j);
+				if (pred1 == block) continue;
 
 				if (!is_cdep_on(pred1, dependency)) continue;