From: Andreas Zwinkau <zwinkau@kit.edu>
Date: Tue, 31 May 2011 10:56:27 +0000 (+0200)
Subject: optimize_blocks ignores unreachable blocks
X-Git-Url: http://nsz.repo.hu/git/?a=commitdiff_plain;ds=sidebyside;h=c9665fa5c7f6a7ebef2e44ee48a8b4c5f102cf92;p=libfirm

optimize_blocks ignores unreachable blocks

Fixes opt/ioet.c
---

diff --git a/ir/opt/cfopt.c b/ir/opt/cfopt.c
index 308fe0fb2..99b9116f9 100644
--- a/ir/opt/cfopt.c
+++ b/ir/opt/cfopt.c
@@ -283,6 +283,11 @@ static void optimize_blocks(ir_node *b, void *ctx)
 	ir_node **in;
 	merge_env *env = (merge_env*)ctx;
 
+	if (get_Block_dom_depth(b) < 0) {
+		/* ignore unreachable blocks */
+		return;
+	}
+
 	/* Count the number of predecessor if this block is merged with pred blocks
 	   that are empty. */
 	max_preds = 0;