From: Michael Beck <beck@ipd.info.uni-karlsruhe.de>
Date: Thu, 24 Jun 2004 15:03:29 +0000 (+0000)
Subject: An ir_node may be even smaller than a struct ir_node, so make right copy
X-Git-Url: http://nsz.repo.hu/git/?a=commitdiff_plain;h=d61a9a7a1dc459e8089092eeb8d325f99e6e0196;p=libfirm

An ir_node may be even smaller than a struct ir_node, so make right copy
to shut up valgrind (and prevend possible segfaults)

[r3206]
---

diff --git a/ir/ir/iropt.c b/ir/ir/iropt.c
index ce0e56975..a60667777 100644
--- a/ir/ir/iropt.c
+++ b/ir/ir/iropt.c
@@ -1568,8 +1568,12 @@ optimize_node (ir_node *n)
 	 * we MUST copy the node here temparary, because it's still needed
 	 * for DBG_OPT_ALGSIM0
 	 */
-	ir_node x = *n;
-	oldn = &x;
+	int node_size = offsetof(ir_node, attr) +  n->op->attr_size;
+	ir_node *x = alloca(node_size);
+
+	memcpy(x, n, node_size);
+	oldn = x;
+
         /* evaluation was successful -- replace the node. */
 	obstack_free (current_ir_graph->obst, n);
 	n = new_Const (get_tarval_mode (tv), tv);