------- Comment #4 from pinskia at gcc dot gnu dot org 2006-01-11 13:09 -------
The diff between dse and forwrop:
--- pr25734.c.t88.dse2 2006-01-11 14:08:11.000000000 +0100
+++ pr25734.c.t89.forwprop3 2006-01-11 14:08:11.000000000 +0100
@@ -1,6 +1,19 @@
;; Function sysfs_hash_and_remove (sysfs_hash_and_remove)
+
+
+Symbols to be put in SSA form
+
+TMT.6 TMT.7
+
+Incremental SSA update started at block: 0
+
+Number of blocks in CFG: 8
+Number of blocks to update: 6 ( 75%)
+
+
+
sysfs_hash_and_remove (dir, name)
{
struct list_head * entry;
@@ -32,10 +45,9 @@ sysfs_hash_and_remove (dir, name)
# sd_17 = PHI <sd_1(3)>;
<L1>:;
- entry_16 = &sd_17->s_sibling;
- D.1917_18 = entry_16->next;
+ D.1917_18 = sd_17->s_sibling.next;
__list_del (D.1917_18);
- entry_16->next = entry_16;
+ sd_17->s_sibling.next = entry_16;
goto <bb 7> (<L4>);
<L2>:;
---
Even though we prop entry_16 into simplify into sd_17, we still have a
reference to entry_16.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25734
