This is the mail archive of the
gcc-bugs@gcc.gnu.org
mailing list for the GCC project.
[Bug target/45752] [4.5 regression] ICE in ix86_vectorize_builtin_vec_perm_ok
- From: "rguenth at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 23 Sep 2010 09:30:22 -0000
- Subject: [Bug target/45752] [4.5 regression] ICE in ix86_vectorize_builtin_vec_perm_ok
- References: <bug-45752-16011@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #2 from rguenth at gcc dot gnu dot org 2010-09-23 09:30 -------
Confirmed.
#2 0x0000000000ec5b41 in ix86_vectorize_builtin_vec_perm_ok (
vec_type=0x7ffff5a04dc8, mask=0x7ffff5a7d2a0)
at /space/rguenther/src/svn/gcc-4_5-branch/gcc/config/i386/i386.c:30144
30144 gcc_assert (vec_mask > 0 && vec_mask <= 3);
(gdb) p vec_mask
$1 = 0
1912 if (!targetm.vectorize.builtin_vec_perm_ok (vectype,
1913
mask_vec))
(gdb) call debug_generic_expr (mask_vec)
{ 0xfffffffffffffffffffffffffffffff8, 0xfffffffffffffffffffffffffffffff8,
0xfffffffffffffffffffffffffffffff8, 0xfffffffffffffffffffffffffffffffb,
0xfffffffffffffffffffffffffffffffb, 0xfffffffffffffffffffffffffffffffb,
0xfffffffffffffffffffffffffffffffe, 0xfffffffffffffffffffffffffffffffe }
(gdb) call debug_generic_expr (vectype)
const vector short unsigned int
I don't know why the mask elements are negative, but that's certainly
the problem with extract_vec_perm_cst which requires positive elements.
The problem is surely latent on trunk (no changes in that area).
Ira?
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |irar at gcc dot gnu dot org
Status|UNCONFIRMED |NEW
Ever Confirmed|0 |1
Known to fail| |4.5.0 4.5.1
Known to work| |4.4.4 4.6.0
Last reconfirmed|0000-00-00 00:00:00 |2010-09-23 09:30:22
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45752