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[Bug tree-optimization/37207] [4.4 Regression] ice at tree-ssa-ifcombine.c:222 for -Os
- From: "pinskia at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 24 Aug 2008 22:40:19 -0000
- Subject: [Bug tree-optimization/37207] [4.4 Regression] ice at tree-ssa-ifcombine.c:222 for -Os
- References: <bug-37207-12544@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #1 from pinskia at gcc dot gnu dot org 2008-08-24 22:40 -------
Confirmed. One issue is that VRP does not look again at some % statements when
it knows it can be a constant so we produce:
D.1962_10 = 0;
D.1963_11 = (int) D.1962_10;
Here is a more reduced testcase:
func_18 ( int t )
{
unsigned l_889;
int l_895 = 1;
for (0; 1; ++l_889)
{
int t1 = 0;
if (func_81 (1))
{
int rhs = l_895;
if (rhs == 0)
rhs = 1;
if (1 & (t % rhs))
t1 = 1;
}
func_98 (t1);
l_895 = 0;
}
}
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Component|c |tree-optimization
Ever Confirmed|0 |1
GCC build triplet|i686-pc-linux-gnu |
GCC host triplet|i686-pc-linux-gnu |
GCC target triplet|i686-pc-linux-gnu |i686-*-*, x86_64-*-*
Keywords| |ice-on-valid-code
Last reconfirmed|0000-00-00 00:00:00 |2008-08-24 22:40:19
date| |
Summary|ice at tree-ssa- |[4.4 Regression] ice at
|ifcombine.c:222 |tree-ssa-ifcombine.c:222 for
| |-Os
Target Milestone|--- |4.4.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37207