* [Bug rtl-optimization/57425] RTL alias analysis unprepared to handle stack slot sharing
2013-05-26 22:52 [Bug rtl-optimization/57425] New: RTL alias analysis unprepared to handle stack slot sharing amylaar at gcc dot gnu.org
@ 2013-05-26 22:53 ` amylaar at gcc dot gnu.org
2013-05-26 23:21 ` amylaar at gcc dot gnu.org
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From: amylaar at gcc dot gnu.org @ 2013-05-26 22:53 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57425
--- Comment #1 from Jorn Wolfgang Rennecke <amylaar at gcc dot gnu.org> ---
Created attachment 30199
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=30199&action=edit
testcase variant using int / long arrays
^ permalink raw reply [flat|nested] 20+ messages in thread
* [Bug rtl-optimization/57425] RTL alias analysis unprepared to handle stack slot sharing
2013-05-26 22:52 [Bug rtl-optimization/57425] New: RTL alias analysis unprepared to handle stack slot sharing amylaar at gcc dot gnu.org
2013-05-26 22:53 ` [Bug rtl-optimization/57425] " amylaar at gcc dot gnu.org
@ 2013-05-26 23:21 ` amylaar at gcc dot gnu.org
2013-05-27 7:53 ` [Bug rtl-optimization/57425] [4.8/4.9 regression] " ebotcazou at gcc dot gnu.org
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From: amylaar at gcc dot gnu.org @ 2013-05-26 23:21 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57425
--- Comment #2 from Jorn Wolfgang Rennecke <amylaar at gcc dot gnu.org> ---
Created attachment 30200
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=30200&action=edit
Test case variant using long / long long arrays
This, too, fails on i686-pc-linux-gnu.
^ permalink raw reply [flat|nested] 20+ messages in thread
* [Bug rtl-optimization/57425] [4.8/4.9 regression] RTL alias analysis unprepared to handle stack slot sharing
2013-05-26 22:52 [Bug rtl-optimization/57425] New: RTL alias analysis unprepared to handle stack slot sharing amylaar at gcc dot gnu.org
2013-05-26 22:53 ` [Bug rtl-optimization/57425] " amylaar at gcc dot gnu.org
2013-05-26 23:21 ` amylaar at gcc dot gnu.org
@ 2013-05-27 7:53 ` ebotcazou at gcc dot gnu.org
2013-05-27 8:08 ` rguenth at gcc dot gnu.org
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From: ebotcazou at gcc dot gnu.org @ 2013-05-27 7:53 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57425
Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2013-05-27
CC| |ebotcazou at gcc dot gnu.org
Target Milestone|--- |4.8.1
Summary|RTL alias analysis |[4.8/4.9 regression] RTL
|unprepared to handle stack |alias analysis unprepared
|slot sharing |to handle stack slot
| |sharing
Ever confirmed|0 |1
--- Comment #3 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Confirmed, but the .172r.cse1 dump already looks suspicious to me.
^ permalink raw reply [flat|nested] 20+ messages in thread
* [Bug rtl-optimization/57425] [4.8/4.9 regression] RTL alias analysis unprepared to handle stack slot sharing
2013-05-26 22:52 [Bug rtl-optimization/57425] New: RTL alias analysis unprepared to handle stack slot sharing amylaar at gcc dot gnu.org
` (2 preceding siblings ...)
2013-05-27 7:53 ` [Bug rtl-optimization/57425] [4.8/4.9 regression] " ebotcazou at gcc dot gnu.org
@ 2013-05-27 8:08 ` rguenth at gcc dot gnu.org
2013-05-27 8:31 ` ebotcazou at gcc dot gnu.org
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From: rguenth at gcc dot gnu.org @ 2013-05-27 8:08 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57425
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Note that I only recently fixed a wrong alias query from using true_dependence
to anti_dependence. Similar issues may exist elsewhere.
^ permalink raw reply [flat|nested] 20+ messages in thread
* [Bug rtl-optimization/57425] [4.8/4.9 regression] RTL alias analysis unprepared to handle stack slot sharing
2013-05-26 22:52 [Bug rtl-optimization/57425] New: RTL alias analysis unprepared to handle stack slot sharing amylaar at gcc dot gnu.org
` (3 preceding siblings ...)
2013-05-27 8:08 ` rguenth at gcc dot gnu.org
@ 2013-05-27 8:31 ` ebotcazou at gcc dot gnu.org
2013-05-31 10:59 ` jakub at gcc dot gnu.org
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From: ebotcazou at gcc dot gnu.org @ 2013-05-27 8:31 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57425
--- Comment #5 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> Note that I only recently fixed a wrong alias query from using
> true_dependence to anti_dependence. Similar issues may exist elsewhere.
That would point to cselib_invalidate_mem then. It uses canon_true_dependence
but here we have an anti-dependence (WAR).
^ permalink raw reply [flat|nested] 20+ messages in thread
* [Bug rtl-optimization/57425] [4.8/4.9 regression] RTL alias analysis unprepared to handle stack slot sharing
2013-05-26 22:52 [Bug rtl-optimization/57425] New: RTL alias analysis unprepared to handle stack slot sharing amylaar at gcc dot gnu.org
` (4 preceding siblings ...)
2013-05-27 8:31 ` ebotcazou at gcc dot gnu.org
@ 2013-05-31 10:59 ` jakub at gcc dot gnu.org
2013-06-15 20:16 ` amylaar at gcc dot gnu.org
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From: jakub at gcc dot gnu.org @ 2013-05-31 10:59 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57425
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|4.8.1 |4.8.2
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 4.8.1 has been released.
^ permalink raw reply [flat|nested] 20+ messages in thread
* [Bug rtl-optimization/57425] [4.8/4.9 regression] RTL alias analysis unprepared to handle stack slot sharing
2013-05-26 22:52 [Bug rtl-optimization/57425] New: RTL alias analysis unprepared to handle stack slot sharing amylaar at gcc dot gnu.org
` (5 preceding siblings ...)
2013-05-31 10:59 ` jakub at gcc dot gnu.org
@ 2013-06-15 20:16 ` amylaar at gcc dot gnu.org
2013-10-16 9:51 ` jakub at gcc dot gnu.org
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From: amylaar at gcc dot gnu.org @ 2013-06-15 20:16 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57425
Jorn Wolfgang Rennecke <amylaar at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #30310|0 |1
is obsolete| |
--- Comment #8 from Jorn Wolfgang Rennecke <amylaar at gcc dot gnu.org> ---
Created attachment 30311
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=30311&action=edit
patch with cselib / testsuite bits added
I'm currently testing this patch.
^ permalink raw reply [flat|nested] 20+ messages in thread
* [Bug rtl-optimization/57425] [4.8/4.9 regression] RTL alias analysis unprepared to handle stack slot sharing
2013-05-26 22:52 [Bug rtl-optimization/57425] New: RTL alias analysis unprepared to handle stack slot sharing amylaar at gcc dot gnu.org
` (6 preceding siblings ...)
2013-06-15 20:16 ` amylaar at gcc dot gnu.org
@ 2013-10-16 9:51 ` jakub at gcc dot gnu.org
2013-10-18 16:06 ` mikpelinux at gmail dot com
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From: jakub at gcc dot gnu.org @ 2013-10-16 9:51 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57425
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|4.8.2 |4.8.3
--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 4.8.2 has been released.
^ permalink raw reply [flat|nested] 20+ messages in thread
* [Bug rtl-optimization/57425] [4.8/4.9 regression] RTL alias analysis unprepared to handle stack slot sharing
2013-05-26 22:52 [Bug rtl-optimization/57425] New: RTL alias analysis unprepared to handle stack slot sharing amylaar at gcc dot gnu.org
` (7 preceding siblings ...)
2013-10-16 9:51 ` jakub at gcc dot gnu.org
@ 2013-10-18 16:06 ` mikpelinux at gmail dot com
2013-10-25 10:23 ` [Bug rtl-optimization/57425] [4.8 Regression] " rguenth at gcc dot gnu.org
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From: mikpelinux at gmail dot com @ 2013-10-18 16:06 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57425
Mikael Pettersson <mikpelinux at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mikpelinux at gmail dot com
--- Comment #10 from Mikael Pettersson <mikpelinux at gmail dot com> ---
I believe this is fixed on trunk since June, by r200133 + r200177 + r200241.
^ permalink raw reply [flat|nested] 20+ messages in thread
* [Bug rtl-optimization/57425] [4.8 Regression] RTL alias analysis unprepared to handle stack slot sharing
2013-05-26 22:52 [Bug rtl-optimization/57425] New: RTL alias analysis unprepared to handle stack slot sharing amylaar at gcc dot gnu.org
` (8 preceding siblings ...)
2013-10-18 16:06 ` mikpelinux at gmail dot com
@ 2013-10-25 10:23 ` rguenth at gcc dot gnu.org
2014-03-13 3:00 ` wschmidt at gcc dot gnu.org
` (8 subsequent siblings)
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From: rguenth at gcc dot gnu.org @ 2013-10-25 10:23 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57425
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |4.9.0
Summary|[4.8/4.9 regression] RTL |[4.8 Regression] RTL alias
|alias analysis unprepared |analysis unprepared to
|to handle stack slot |handle stack slot sharing
|sharing |
Known to fail| |4.8.2
Severity|major |normal
--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed on trunk.
^ permalink raw reply [flat|nested] 20+ messages in thread
* [Bug rtl-optimization/57425] [4.8 Regression] RTL alias analysis unprepared to handle stack slot sharing
2013-05-26 22:52 [Bug rtl-optimization/57425] New: RTL alias analysis unprepared to handle stack slot sharing amylaar at gcc dot gnu.org
` (9 preceding siblings ...)
2013-10-25 10:23 ` [Bug rtl-optimization/57425] [4.8 Regression] " rguenth at gcc dot gnu.org
@ 2014-03-13 3:00 ` wschmidt at gcc dot gnu.org
2014-03-13 8:41 ` mikpelinux at gmail dot com
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From: wschmidt at gcc dot gnu.org @ 2014-03-13 3:00 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57425
Bill Schmidt <wschmidt at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |wschmidt at gcc dot gnu.org
--- Comment #12 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
(In reply to Eric Botcazou from comment #5)
> > Note that I only recently fixed a wrong alias query from using
> > true_dependence to anti_dependence. Similar issues may exist elsewhere.
>
> That would point to cselib_invalidate_mem then. It uses
> canon_true_dependence but here we have an anti-dependence (WAR).
I believe I've run into this problem in 4.8 as well when compiling some code
for powerpc64le-linux-gnu (so for now that is on ibm/gcc-4_8-branch). At least
I'm seeing invalid commoning involving memory references in cselib, and the
problem doesn't reproduce on trunk.
Does anyone have a patch in progress for backporting this fix to 4.8?
^ permalink raw reply [flat|nested] 20+ messages in thread
* [Bug rtl-optimization/57425] [4.8 Regression] RTL alias analysis unprepared to handle stack slot sharing
2013-05-26 22:52 [Bug rtl-optimization/57425] New: RTL alias analysis unprepared to handle stack slot sharing amylaar at gcc dot gnu.org
` (10 preceding siblings ...)
2014-03-13 3:00 ` wschmidt at gcc dot gnu.org
@ 2014-03-13 8:41 ` mikpelinux at gmail dot com
2014-03-13 15:01 ` wschmidt at gcc dot gnu.org
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From: mikpelinux at gmail dot com @ 2014-03-13 8:41 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57425
--- Comment #13 from Mikael Pettersson <mikpelinux at gmail dot com> ---
Created attachment 32343
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=32343&action=edit
4.8 backport of Joern's fixes
This is the backport of Joern's fixes to 4.8 I did last summer. Tested w/o
regressions on x86_64, sparc64, powerpc64, armv5tel, and m68k.
^ permalink raw reply [flat|nested] 20+ messages in thread
* [Bug rtl-optimization/57425] [4.8 Regression] RTL alias analysis unprepared to handle stack slot sharing
2013-05-26 22:52 [Bug rtl-optimization/57425] New: RTL alias analysis unprepared to handle stack slot sharing amylaar at gcc dot gnu.org
` (11 preceding siblings ...)
2014-03-13 8:41 ` mikpelinux at gmail dot com
@ 2014-03-13 15:01 ` wschmidt at gcc dot gnu.org
2014-03-13 18:59 ` mikpelinux at gmail dot com
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From: wschmidt at gcc dot gnu.org @ 2014-03-13 15:01 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57425
--- Comment #14 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Hi Mikael,
Indeed, your patch fixes my problem as well. Do you have plans to push this
upstream? It would be helpful if we could merge this from gcc-4_8-branch into
ibm/gcc-4_8-branch for an upcoming delivery.
Thanks!
Bill
^ permalink raw reply [flat|nested] 20+ messages in thread
* [Bug rtl-optimization/57425] [4.8 Regression] RTL alias analysis unprepared to handle stack slot sharing
2013-05-26 22:52 [Bug rtl-optimization/57425] New: RTL alias analysis unprepared to handle stack slot sharing amylaar at gcc dot gnu.org
` (12 preceding siblings ...)
2014-03-13 15:01 ` wschmidt at gcc dot gnu.org
@ 2014-03-13 18:59 ` mikpelinux at gmail dot com
2014-03-13 19:03 ` wschmidt at gcc dot gnu.org
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From: mikpelinux at gmail dot com @ 2014-03-13 18:59 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57425
--- Comment #15 from Mikael Pettersson <mikpelinux at gmail dot com> ---
Bill,
I can submit the patch on Saturday (too busy before then), but I don't have
commit rights so someone else will have to commit it (assuming it's approved).
/Mikael
^ permalink raw reply [flat|nested] 20+ messages in thread
* [Bug rtl-optimization/57425] [4.8 Regression] RTL alias analysis unprepared to handle stack slot sharing
2013-05-26 22:52 [Bug rtl-optimization/57425] New: RTL alias analysis unprepared to handle stack slot sharing amylaar at gcc dot gnu.org
` (13 preceding siblings ...)
2014-03-13 18:59 ` mikpelinux at gmail dot com
@ 2014-03-13 19:03 ` wschmidt at gcc dot gnu.org
2014-03-15 18:07 ` mikpelinux at gmail dot com
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From: wschmidt at gcc dot gnu.org @ 2014-03-13 19:03 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57425
--- Comment #16 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Mikael, thanks very much. I'll be happy to commit on your behalf once the
patch is approved.
^ permalink raw reply [flat|nested] 20+ messages in thread
* [Bug rtl-optimization/57425] [4.8 Regression] RTL alias analysis unprepared to handle stack slot sharing
2013-05-26 22:52 [Bug rtl-optimization/57425] New: RTL alias analysis unprepared to handle stack slot sharing amylaar at gcc dot gnu.org
` (14 preceding siblings ...)
2014-03-13 19:03 ` wschmidt at gcc dot gnu.org
@ 2014-03-15 18:07 ` mikpelinux at gmail dot com
2014-03-17 9:49 ` mikpelinux at gmail dot com
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From: mikpelinux at gmail dot com @ 2014-03-15 18:07 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57425
--- Comment #17 from Mikael Pettersson <mikpelinux at gmail dot com> ---
The backport patch has now been submitted:
http://gcc.gnu.org/ml/gcc-patches/2014-03/msg00758.html
^ permalink raw reply [flat|nested] 20+ messages in thread
* [Bug rtl-optimization/57425] [4.8 Regression] RTL alias analysis unprepared to handle stack slot sharing
2013-05-26 22:52 [Bug rtl-optimization/57425] New: RTL alias analysis unprepared to handle stack slot sharing amylaar at gcc dot gnu.org
` (15 preceding siblings ...)
2014-03-15 18:07 ` mikpelinux at gmail dot com
@ 2014-03-17 9:49 ` mikpelinux at gmail dot com
2014-03-17 15:32 ` wschmidt at gcc dot gnu.org
2014-03-23 10:53 ` ebotcazou at gcc dot gnu.org
18 siblings, 0 replies; 20+ messages in thread
From: mikpelinux at gmail dot com @ 2014-03-17 9:49 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57425
--- Comment #18 from Mikael Pettersson <mikpelinux at gmail dot com> ---
Bill, the backport patch has now been approved:
http://gcc.gnu.org/ml/gcc-patches/2014-03/msg00792.html
^ permalink raw reply [flat|nested] 20+ messages in thread
* [Bug rtl-optimization/57425] [4.8 Regression] RTL alias analysis unprepared to handle stack slot sharing
2013-05-26 22:52 [Bug rtl-optimization/57425] New: RTL alias analysis unprepared to handle stack slot sharing amylaar at gcc dot gnu.org
` (16 preceding siblings ...)
2014-03-17 9:49 ` mikpelinux at gmail dot com
@ 2014-03-17 15:32 ` wschmidt at gcc dot gnu.org
2014-03-23 10:53 ` ebotcazou at gcc dot gnu.org
18 siblings, 0 replies; 20+ messages in thread
From: wschmidt at gcc dot gnu.org @ 2014-03-17 15:32 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57425
--- Comment #19 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Author: wschmidt
Date: Mon Mar 17 15:31:43 2014
New Revision: 208620
URL: http://gcc.gnu.org/viewcvs?rev=208620&root=gcc&view=rev
Log:
gcc/
2014-03-17 Mikael Pettersson <mikpelinux@gmail.com>
Committed by Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Backport from mainline:
2013-06-20 Joern Rennecke <joern.rennecke@embecosm.com>
PR rtl-optimization/57425
PR rtl-optimization/57569
* alias.c (write_dependence_p): Remove parameters mem_mode and
canon_mem_addr. Add parameters x_mode, x_addr and x_canonicalized.
Changed all callers.
(canon_anti_dependence): Get comments and semantics in sync.
Add parameter mem_canonicalized. Changed all callers.
* rtl.h (canon_anti_dependence): Update prototype.
2013-06-16 Joern Rennecke <joern.rennecke@embecosm.com>
PR rtl-optimization/57425
PR rtl-optimization/57569
* alias.c (write_dependence_p): Add new parameters mem_mode,
canon_mem_addr and mem_canonicalized. Change type of writep to bool.
Changed all callers.
(canon_anti_dependence): New function.
* cse.c (check_dependence): Use canon_anti_dependence.
* cselib.c (cselib_invalidate_mem): Likewise.
* rtl.h (canon_anti_dependence): Declare.
gcc/testsuite/
2014-03-17 Mikael Pettersson <mikpelinux@gmail.com>
Committed by Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Backport from mainline:
2013-06-16 Joern Rennecke <joern.rennecke@embecosm.com>
PR rtl-optimization/57425
PR rtl-optimization/57569
* gcc.dg/torture/pr57425-1.c, gcc.dg/torture/pr57425-2.c: New files.
* gcc.dg/torture/pr57425-3.c, gcc.dg/torture/pr57569.c: Likewise.
Added:
branches/gcc-4_8-branch/gcc/testsuite/gcc.dg/torture/pr57425-1.c
branches/gcc-4_8-branch/gcc/testsuite/gcc.dg/torture/pr57425-2.c
branches/gcc-4_8-branch/gcc/testsuite/gcc.dg/torture/pr57425-3.c
branches/gcc-4_8-branch/gcc/testsuite/gcc.dg/torture/pr57569.c
Modified:
branches/gcc-4_8-branch/gcc/ChangeLog
branches/gcc-4_8-branch/gcc/alias.c
branches/gcc-4_8-branch/gcc/cse.c
branches/gcc-4_8-branch/gcc/cselib.c
branches/gcc-4_8-branch/gcc/rtl.h
branches/gcc-4_8-branch/gcc/testsuite/ChangeLog
^ permalink raw reply [flat|nested] 20+ messages in thread
* [Bug rtl-optimization/57425] [4.8 Regression] RTL alias analysis unprepared to handle stack slot sharing
2013-05-26 22:52 [Bug rtl-optimization/57425] New: RTL alias analysis unprepared to handle stack slot sharing amylaar at gcc dot gnu.org
` (17 preceding siblings ...)
2014-03-17 15:32 ` wschmidt at gcc dot gnu.org
@ 2014-03-23 10:53 ` ebotcazou at gcc dot gnu.org
18 siblings, 0 replies; 20+ messages in thread
From: ebotcazou at gcc dot gnu.org @ 2014-03-23 10:53 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57425
Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #20 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Fixed everywhere now.
^ permalink raw reply [flat|nested] 20+ messages in thread