From: Christoph Mallon <christoph.mallon@gmx.de>
Date: Wed, 31 Oct 2007 17:18:13 +0000 (+0000)
Subject: Conv_A(Unknown_B) -> Unknown_A.
X-Git-Url: http://nsz.repo.hu/git/?a=commitdiff_plain;h=4b5a2b3bb5f3b411953f035d9800e9f3969dab2a;p=libfirm

Conv_A(Unknown_B) -> Unknown_A.

[r16399]
---

diff --git a/ir/ir/iropt.c b/ir/ir/iropt.c
index 915af89ae..7a6321fb1 100644
--- a/ir/ir/iropt.c
+++ b/ir/ir/iropt.c
@@ -4667,6 +4667,12 @@ static ir_node *transform_node_Conv(ir_node *n) {
 			return c;
 		}
 	}
+
+	if (is_Unknown(a)) { /* Conv_A(Unknown_B) -> Unknown_A */
+		ir_mode *mode = get_irn_mode(n);
+		return new_r_Unknown(current_ir_graph, mode);
+	}
+
 	return n;
 }  /* transform_node_Conv */