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* [Bug tree-optimization/18439] vectorizer failed for vector normalization
[not found] <bug-18439-4@http.gcc.gnu.org/bugzilla/>
@ 2011-05-22 16:27 ` steven at gcc dot gnu.org
2012-07-13 8:41 ` rguenth at gcc dot gnu.org
2014-03-13 10:52 ` rguenth at gcc dot gnu.org
2 siblings, 0 replies; 6+ messages in thread
From: steven at gcc dot gnu.org @ 2011-05-22 16:27 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18439
Steven Bosscher <steven at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed|2005-12-21 03:49:30 |2011-05-22 17:43:30
CC| |irar at il dot ibm.com
--- Comment #4 from Steven Bosscher <steven at gcc dot gnu.org> 2011-05-22 15:43:42 UTC ---
Still not vectorized with recent GCC:
t.c:19: note: not vectorized: complicated access pattern.
t.c:21: note: not vectorized: complicated access pattern.
1 extern double sqrt(double);
2 typedef unsigned int bool;
3 #define true 1
4 #define NUMPOINTS 50000
5
6 static float points[NUMPOINTS][4];
7 static float opoints[NUMPOINTS][4];
8 static bool flags[NUMPOINTS];
9
10 void NormalizeVectors (void)
11 {
12 int i, r;
13 float s, x, y, z;
14 static float d = 0.0;
15
16 d += 0.2;
17 if (d > 4) d = 0.0;
18
19 for (r=0; r<4; r++)
20 {
21 for (i=0; i<NUMPOINTS; i++)
22 {
23 x = points[i][0];
24 y = points[i][1];
25 z = points[i][2];
26 s = x * x
27 + y * y
28 + z * z;
29 s = d / sqrt (s);
30 opoints[i][0] = x * s;
31 opoints[i][1] = y * s;
32 opoints[i][2] = z * s;
33 flags[i] = true;
34 }
35 }
36 }
37
"GCC: (GNU) 4.6.0 20110312 (experimental) [trunk revision 170907]"
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/18439] vectorizer failed for vector normalization
[not found] <bug-18439-4@http.gcc.gnu.org/bugzilla/>
2011-05-22 16:27 ` [Bug tree-optimization/18439] vectorizer failed for vector normalization steven at gcc dot gnu.org
@ 2012-07-13 8:41 ` rguenth at gcc dot gnu.org
2014-03-13 10:52 ` rguenth at gcc dot gnu.org
2 siblings, 0 replies; 6+ messages in thread
From: rguenth at gcc dot gnu.org @ 2012-07-13 8:41 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18439
Richard Guenther <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Blocks| |53947
--- Comment #5 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-07-13 08:40:23 UTC ---
Link to vectorizer missed-optimization meta-bug.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/18439] vectorizer failed for vector normalization
[not found] <bug-18439-4@http.gcc.gnu.org/bugzilla/>
2011-05-22 16:27 ` [Bug tree-optimization/18439] vectorizer failed for vector normalization steven at gcc dot gnu.org
2012-07-13 8:41 ` rguenth at gcc dot gnu.org
@ 2014-03-13 10:52 ` rguenth at gcc dot gnu.org
2 siblings, 0 replies; 6+ messages in thread
From: rguenth at gcc dot gnu.org @ 2014-03-13 10:52 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18439
Bug 18439 depends on bug 19905, which changed state.
Bug 19905 Summary: Extra V_MAY_DEF on a static variable whose address is not taken (we should be able to move the load out of the loop)
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19905
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/18439] vectorizer failed for vector normalization
2004-11-12 1:33 [Bug tree-optimization/18439] New: " giovannibajo at libero dot it
2004-11-12 2:43 ` [Bug tree-optimization/18439] " pinskia at gcc dot gnu dot org
2005-02-11 19:24 ` pinskia at gcc dot gnu dot org
@ 2005-02-11 19:34 ` pinskia at gcc dot gnu dot org
2 siblings, 0 replies; 6+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-02-11 19:34 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2005-02-11 14:47 -------
I filed PR 19905 for the missed optimization not really related (but blocking) the tree vectorizor.
--
What |Removed |Added
----------------------------------------------------------------------------
BugsThisDependsOn| |19905
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18439
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/18439] vectorizer failed for vector normalization
2004-11-12 1:33 [Bug tree-optimization/18439] New: " giovannibajo at libero dot it
2004-11-12 2:43 ` [Bug tree-optimization/18439] " pinskia at gcc dot gnu dot org
@ 2005-02-11 19:24 ` pinskia at gcc dot gnu dot org
2005-02-11 19:34 ` pinskia at gcc dot gnu dot org
2 siblings, 0 replies; 6+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-02-11 19:24 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2005-02-11 14:19 -------
Really there are two problems which cause the missed vectorizor. One is that we don't scalarize the
static variables that well. So that is the bug which really needs to be fixed first and really is not related
to the vectorizor at all.
--
What |Removed |Added
----------------------------------------------------------------------------
CC| |pinskia at gcc dot gnu dot
| |org
Last reconfirmed|2004-11-12 02:43:29 |2005-02-11 14:19:47
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18439
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/18439] vectorizer failed for vector normalization
2004-11-12 1:33 [Bug tree-optimization/18439] New: " giovannibajo at libero dot it
@ 2004-11-12 2:43 ` pinskia at gcc dot gnu dot org
2005-02-11 19:24 ` pinskia at gcc dot gnu dot org
2005-02-11 19:34 ` pinskia at gcc dot gnu dot org
2 siblings, 0 replies; 6+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-11-12 2:43 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-11-12 02:43 -------
Confirmed, ICC can do this but does not because it is not very inefficient to do it.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever Confirmed| |1
Last reconfirmed|0000-00-00 00:00:00 |2004-11-12 02:43:29
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18439
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2014-03-13 10:52 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
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[not found] <bug-18439-4@http.gcc.gnu.org/bugzilla/>
2011-05-22 16:27 ` [Bug tree-optimization/18439] vectorizer failed for vector normalization steven at gcc dot gnu.org
2012-07-13 8:41 ` rguenth at gcc dot gnu.org
2014-03-13 10:52 ` rguenth at gcc dot gnu.org
2004-11-12 1:33 [Bug tree-optimization/18439] New: " giovannibajo at libero dot it
2004-11-12 2:43 ` [Bug tree-optimization/18439] " pinskia at gcc dot gnu dot org
2005-02-11 19:24 ` pinskia at gcc dot gnu dot org
2005-02-11 19:34 ` pinskia at gcc dot gnu dot org
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