From: Michael Beck <beck@ipd.info.uni-karlsruhe.de>
Date: Thu, 2 Oct 2008 13:55:27 +0000 (+0000)
Subject: reduce the number of created Confirms
X-Git-Url: http://nsz.repo.hu/git/?a=commitdiff_plain;h=88feab163b4e857b1f5657f016bf3c90354b7f3b;p=libfirm

reduce the number of created Confirms

[r22414]
---

diff --git a/ir/ana/irconsconfirm.c b/ir/ana/irconsconfirm.c
index 605246782..fa8d7edc9 100644
--- a/ir/ana/irconsconfirm.c
+++ b/ir/ana/irconsconfirm.c
@@ -474,6 +474,13 @@ static void insert_non_null(ir_node *ptr, ir_node *block, env_t *env) {
  * Checks if a node is a non-null Confirm.
  */
 static int is_non_null_Confirm(const ir_node *ptr) {
+	/*
+	 * While a SymConst is not a Confirm, it is non-null
+	 * anyway. This helps to reduce the number of
+	 * constructed Confirms.
+	 */
+	if (is_SymConst_addr_ent(ptr))
+		return 0;
 	for (;;) {
 		if (! is_Confirm(ptr))
 			return 0;