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* [Bug tree-optimization/42778] New: Superfluous stack management code is generated
@ 2010-01-17 20:06 piotr dot wyderski at gmail dot com
2010-02-07 20:09 ` [Bug target/42778] " pinskia at gcc dot gnu dot org
2010-05-05 15:44 ` hjl dot tools at gmail dot com
0 siblings, 2 replies; 4+ messages in thread
From: piotr dot wyderski at gmail dot com @ 2010-01-17 20:06 UTC (permalink / raw)
To: gcc-bugs
#include <x86intrin.h>
int test1(__m128i v) {
return _mm_cvtsi128_si32(v);
}
compiled with
g++ -std=gnu++0x -O2 -m32 -march=native -msse -msse2 -msse3 -Wall
-Werror -Wno-unused -Wno-strict-aliasing -march=native
-fomit-frame-pointer -Wno-pmf-conversions -g main.cpp
emits:
004012e0 <__Z5test1U8__vectorx>:
4012e0: 83 ec 0c sub $0xc,%esp
4012e3: 66 0f 7e c0 movd %xmm0,%eax
4012e7: 83 c4 0c add $0xc,%esp
4012ea: c3 ret
which shows that the stack pointer is being updated
without any purpose.
--
Summary: Superfluous stack management code is generated
Product: gcc
Version: 4.5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: piotr dot wyderski at gmail dot com
GCC host triplet: GCC-trunk(20100107)/Cygwin/WinXP32
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42778
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug target/42778] Superfluous stack management code is generated
2010-01-17 20:06 [Bug tree-optimization/42778] New: Superfluous stack management code is generated piotr dot wyderski at gmail dot com
@ 2010-02-07 20:09 ` pinskia at gcc dot gnu dot org
2010-05-05 15:44 ` hjl dot tools at gmail dot com
1 sibling, 0 replies; 4+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2010-02-07 20:09 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from pinskia at gcc dot gnu dot org 2010-02-07 20:09 -------
Confirmed, a target bug.
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Component|tree-optimization |target
Ever Confirmed|0 |1
GCC host triplet|GCC- |
|trunk(20100107)/Cygwin/WinXP|
|32 |
GCC target triplet| |i?86-*-*
Keywords| |missed-optimization
Known to fail| |4.3.2 4.5.0
Last reconfirmed|0000-00-00 00:00:00 |2010-02-07 20:09:31
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42778
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug target/42778] Superfluous stack management code is generated
2010-01-17 20:06 [Bug tree-optimization/42778] New: Superfluous stack management code is generated piotr dot wyderski at gmail dot com
2010-02-07 20:09 ` [Bug target/42778] " pinskia at gcc dot gnu dot org
@ 2010-05-05 15:44 ` hjl dot tools at gmail dot com
1 sibling, 0 replies; 4+ messages in thread
From: hjl dot tools at gmail dot com @ 2010-05-05 15:44 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from hjl dot tools at gmail dot com 2010-05-05 15:44 -------
*** Bug 43992 has been marked as a duplicate of this bug. ***
--
hjl dot tools at gmail dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |hv at crypt dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42778
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug target/42778] Superfluous stack management code is generated
[not found] <bug-42778-4@http.gcc.gnu.org/bugzilla/>
@ 2012-09-15 16:03 ` sgunderson at bigfoot dot com
0 siblings, 0 replies; 4+ messages in thread
From: sgunderson at bigfoot dot com @ 2012-09-15 16:03 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42778
sgunderson at bigfoot dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |sgunderson at bigfoot dot
| |com
--- Comment #3 from sgunderson at bigfoot dot com 2012-09-15 16:02:37 UTC ---
This seems to be no longer wrong in 4.8.
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2012-09-15 16:03 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2010-01-17 20:06 [Bug tree-optimization/42778] New: Superfluous stack management code is generated piotr dot wyderski at gmail dot com
2010-02-07 20:09 ` [Bug target/42778] " pinskia at gcc dot gnu dot org
2010-05-05 15:44 ` hjl dot tools at gmail dot com
[not found] <bug-42778-4@http.gcc.gnu.org/bugzilla/>
2012-09-15 16:03 ` sgunderson at bigfoot dot com
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