public inbox for gcc-bugs@sourceware.org
help / color / mirror / Atom feed
* [Bug c++/45752] New: [4.5 regression] ICE in ix86_vectorize_builtin_vec_perm_ok
@ 2010-09-22 23:22 y at momonga-linux dot org
2010-09-23 7:20 ` [Bug target/45752] " hjl dot tools at gmail dot com
2010-09-23 9:30 ` rguenth at gcc dot gnu dot org
0 siblings, 2 replies; 5+ messages in thread
From: y at momonga-linux dot org @ 2010-09-22 23:22 UTC (permalink / raw)
To: gcc-bugs
g++ 4.5-20100916 ICEs with "-O3 -march=pentium4" when using the following code:
template<class T>
void transform(const T *in_points,
int num_points,
const float projection_mat[16],
const float modelview_mat[16],
float *out_points)
{
float mat[16];
int row, col;
int i;
const T *in_p;
float *out_p;
for (col = 0; col < 4; col++)
{
for (row = 0; row < 4; row++)
{
mat[col*4+row] = ( projection_mat[0*4+row]*modelview_mat[col*4+0]
+ projection_mat[1*4+row]*modelview_mat[col*4+1]
+ projection_mat[2*4+row]*modelview_mat[col*4+2]
+ projection_mat[3*4+row]*modelview_mat[col*4+3]);
}
}
for (i = 0, in_p = in_points, out_p = out_points; i < num_points;
i++, in_p += 3, out_p += 3)
{
for (row = 0; row < 3; row++)
{
out_p[row] = ( mat[0*4+row]*in_p[0] + mat[1*4+row]*in_p[1]
+ mat[2*4+row]*in_p[2] + mat[3*4+row]);
}
}
if ( (mat[0*4+3] != 0) || (mat[1*4+3] != 0)
|| (mat[0*4+3] != 0) || (mat[1*4+3] != 1) )
{
for (i = 0, in_p = in_points, out_p = out_points; i < num_points;
i++, in_p += 3, out_p += 3)
{
float w = ( mat[0*4+3]*in_p[0] + mat[1*4+3]*in_p[1]
+ mat[2*4+3]*in_p[2] + mat[3*4+3]);
if (w > 0.0)
{
out_p[0] /= w;
out_p[1] /= w;
out_p[2] /= w;
}
else
{
out_p[2] = -static_cast< float >(1.0e+38f);
}
}
}
}
void TransformPoints(double *input,
int num_input,
const float projection_mat[16],
const float modelview_mat[16],
float *output)
{
transform(input, num_input, projection_mat, modelview_mat,
output);
}
void TransformPoints(unsigned short *input,
int num_input,
const float projection_mat[16],
const float modelview_mat[16],
float *output)
{
transform(input, num_input, projection_mat, modelview_mat,
output);
}
--
Summary: [4.5 regression] ICE in
ix86_vectorize_builtin_vec_perm_ok
Product: gcc
Version: 4.5.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: y at momonga-linux dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45752
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug target/45752] [4.5 regression] ICE in ix86_vectorize_builtin_vec_perm_ok
2010-09-22 23:22 [Bug c++/45752] New: [4.5 regression] ICE in ix86_vectorize_builtin_vec_perm_ok y at momonga-linux dot org
@ 2010-09-23 7:20 ` hjl dot tools at gmail dot com
2010-09-23 9:30 ` rguenth at gcc dot gnu dot org
1 sibling, 0 replies; 5+ messages in thread
From: hjl dot tools at gmail dot com @ 2010-09-23 7:20 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from hjl dot tools at gmail dot com 2010-09-23 07:20 -------
It is caused by revision 155584:
http://gcc.gnu.org/ml/gcc-cvs/2010-01/msg00043.html
and fixed by revision 161655:
http://gcc.gnu.org/ml/gcc-cvs/2010-07/msg00006.html
on trunk.
--
hjl dot tools at gmail dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |rguenth at gcc dot gnu dot
| |org
Target Milestone|--- |4.5.2
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45752
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug target/45752] [4.5 regression] ICE in ix86_vectorize_builtin_vec_perm_ok
2010-09-22 23:22 [Bug c++/45752] New: [4.5 regression] ICE in ix86_vectorize_builtin_vec_perm_ok y at momonga-linux dot org
2010-09-23 7:20 ` [Bug target/45752] " hjl dot tools at gmail dot com
@ 2010-09-23 9:30 ` rguenth at gcc dot gnu dot org
1 sibling, 0 replies; 5+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2010-09-23 9:30 UTC (permalink / raw)
To: gcc-bugs
------- 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
^ permalink raw reply [flat|nested] 5+ messages in thread
[parent not found: <bug-45752-4@http.gcc.gnu.org/bugzilla/>]
end of thread, other threads:[~2010-10-04 12:40 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2010-09-22 23:22 [Bug c++/45752] New: [4.5 regression] ICE in ix86_vectorize_builtin_vec_perm_ok y at momonga-linux dot org
2010-09-23 7:20 ` [Bug target/45752] " hjl dot tools at gmail dot com
2010-09-23 9:30 ` rguenth at gcc dot gnu dot org
[not found] <bug-45752-4@http.gcc.gnu.org/bugzilla/>
2010-10-03 10:25 ` irar at il dot ibm.com
2010-10-04 12:40 ` irar at il dot ibm.com
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).