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* [Bug tree-optimization/38885] New: missed FRE with BIT_FIELD_REF and vectors
@ 2009-01-16 21:06 pinskia at gcc dot gnu dot org
2010-03-02 19:07 ` [Bug tree-optimization/38885] " pinskia at gcc dot gnu dot org
0 siblings, 1 reply; 6+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2009-01-16 21:06 UTC (permalink / raw)
To: gcc-bugs
Another one like PR 38884 and 38865.
Simple testcase:
#define vector __attribute__((vector_size(16) ))
vector float global_res;
float x;
int main(int argc)
{
vector float res = (vector float)(0.0f,0.0f,0.0f,1.0f);
res += (vector float)(0.0f,0.0f,0.0f,1.0f);
global_res = res;
x = *(float*)(&global_res);
return 0;
}
--
Summary: missed FRE with BIT_FIELD_REF and vectors
Product: gcc
Version: 4.4.0
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: enhancement
Priority: P3
Component: tree-optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: pinskia at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38885
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/38885] missed FRE with BIT_FIELD_REF and vectors
2009-01-16 21:06 [Bug tree-optimization/38885] New: missed FRE with BIT_FIELD_REF and vectors pinskia at gcc dot gnu dot org
@ 2010-03-02 19:07 ` pinskia at gcc dot gnu dot org
0 siblings, 0 replies; 6+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2010-03-02 19:07 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from pinskia at gcc dot gnu dot org 2010-03-02 19:07 -------
Still happens as of today.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38885
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/38885] missed FRE with BIT_FIELD_REF and vectors
[not found] <bug-38885-4@http.gcc.gnu.org/bugzilla/>
` (2 preceding siblings ...)
2011-10-05 14:37 ` rguenth at gcc dot gnu.org
@ 2011-10-05 14:57 ` rguenth at gcc dot gnu.org
3 siblings, 0 replies; 6+ messages in thread
From: rguenth at gcc dot gnu.org @ 2011-10-05 14:57 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38885
Richard Guenther <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
--- Comment #5 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-10-05 14:57:06 UTC ---
Fixed for 4.7.0.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/38885] missed FRE with BIT_FIELD_REF and vectors
[not found] <bug-38885-4@http.gcc.gnu.org/bugzilla/>
2010-09-24 18:39 ` pinskia at gcc dot gnu.org
2010-09-24 18:44 ` rguenth at gcc dot gnu.org
@ 2011-10-05 14:37 ` rguenth at gcc dot gnu.org
2011-10-05 14:57 ` rguenth at gcc dot gnu.org
3 siblings, 0 replies; 6+ messages in thread
From: rguenth at gcc dot gnu.org @ 2011-10-05 14:37 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38885
--- Comment #4 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-10-05 14:35:22 UTC ---
Author: rguenth
Date: Wed Oct 5 14:35:15 2011
New Revision: 179556
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=179556
Log:
2011-10-05 Richard Guenther <rguenther@suse.de>
PR tree-optimization/38885
* tree-ssa-sccvn.c (vn_reference_lookup_3): Handle partial reads
from constants.
* gcc.dg/tree-ssa/ssa-fre-33.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-33.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-sccvn.c
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/38885] missed FRE with BIT_FIELD_REF and vectors
[not found] <bug-38885-4@http.gcc.gnu.org/bugzilla/>
2010-09-24 18:39 ` pinskia at gcc dot gnu.org
@ 2010-09-24 18:44 ` rguenth at gcc dot gnu.org
2011-10-05 14:37 ` rguenth at gcc dot gnu.org
2011-10-05 14:57 ` rguenth at gcc dot gnu.org
3 siblings, 0 replies; 6+ messages in thread
From: rguenth at gcc dot gnu.org @ 2010-09-24 18:44 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38885
Richard Guenther <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2010.09.24 18:43:43
date| |
AssignedTo|unassigned at gcc dot |rguenth at gcc dot gnu.org
|gnu.org |
Ever Confirmed|0 |1
--- Comment #3 from Richard Guenther <rguenth at gcc dot gnu.org> 2010-09-24 18:43:43 UTC ---
Mine.
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^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/38885] missed FRE with BIT_FIELD_REF and vectors
[not found] <bug-38885-4@http.gcc.gnu.org/bugzilla/>
@ 2010-09-24 18:39 ` pinskia at gcc dot gnu.org
2010-09-24 18:44 ` rguenth at gcc dot gnu.org
` (2 subsequent siblings)
3 siblings, 0 replies; 6+ messages in thread
From: pinskia at gcc dot gnu.org @ 2010-09-24 18:39 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38885
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> 2010-09-24 18:38:58 UTC ---
global_res = { 0.0, 0.0, 0.0, 2.0e+0 };
x.0_4 = BIT_FIELD_REF <global_res, 32, 0>;
x = x.0_4;
return 0;
--
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^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2011-10-05 14:57 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
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2009-01-16 21:06 [Bug tree-optimization/38885] New: missed FRE with BIT_FIELD_REF and vectors pinskia at gcc dot gnu dot org
2010-03-02 19:07 ` [Bug tree-optimization/38885] " pinskia at gcc dot gnu dot org
[not found] <bug-38885-4@http.gcc.gnu.org/bugzilla/>
2010-09-24 18:39 ` pinskia at gcc dot gnu.org
2010-09-24 18:44 ` rguenth at gcc dot gnu.org
2011-10-05 14:37 ` rguenth at gcc dot gnu.org
2011-10-05 14:57 ` rguenth at gcc dot gnu.org
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