From: Matthias Braun <matze@braunis.de>
Date: Mon, 17 Aug 2009 08:11:04 +0000 (+0000)
Subject: benewalloc: fix assert hitting when dying value was used at 2 inputs
X-Git-Url: http://nsz.repo.hu/git/?a=commitdiff_plain;h=73f7bc290cdcc6624bd2c3a7bb75a4a18748ffe2;p=libfirm

benewalloc: fix assert hitting when dying value was used at 2 inputs

[r26369]
---

diff --git a/ir/be/benewalloc.c b/ir/be/benewalloc.c
index 0813ed136..1fe00e7d5 100644
--- a/ir/be/benewalloc.c
+++ b/ir/be/benewalloc.c
@@ -535,7 +535,9 @@ static void free_reg_of_value(ir_node *node)
 	reg               = arch_get_irn_register(node);
 	r                 = arch_register_get_index(reg);
 	assignment        = &assignments[r];
-	assert(assignment->value == node);
+	/* assignment->value may be NULL if a value is used at 2 inputs
+	   so it gets freed twice. */
+	assert(assignment->value == node || assignment->value == NULL);
 	assignment->value = NULL;
 }