A wine testcase started failing with the trunk compiler some days ago.
The difference is pretty obivous in the tree dump:
diff -u encode.c.056t.dce3 encode.c.057t.dse1
--- encode.c.056t.dce3 2007-01-04 23:03:14.000000000 +0100
+++ encode.c.057t.dse1 2007-01-04 23:03:14.000000000 +0100
@@ -52,7 +52,6 @@
int iftmp.507;
<bb 2>:
- info = {};
point = {};
entry = {};
buf = 0B;
However, if you look at it, info is clearly used right below.
I will attach .i, and the two dump files.
--
Summary: tree-ssa-dse incorrectly removes struct initialization
Product: gcc
Version: 4.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: marcus at jet dot franken dot de
GCC build triplet: i686-pc-linux-gnu
GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30375
