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* [Bug other/46865] New: Using -save-temps (or ccache, distcc) produces different results with multiline macros containing asm code
@ 2010-12-09 13:52 juha.kallioinen at nokia dot com
2010-12-09 14:46 ` [Bug other/46865] " rguenth at gcc dot gnu.org
` (12 more replies)
0 siblings, 13 replies; 14+ messages in thread
From: juha.kallioinen at nokia dot com @ 2010-12-09 13:52 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46865
Summary: Using -save-temps (or ccache, distcc) produces
different results with multiline macros containing asm
code
Product: gcc
Version: 4.5.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: other
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: juha.kallioinen@nokia.com
Created attachment 22691
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22691
example case
See the attached example case.
Also reported here:
https://bugs.launchpad.net/gcc-linaro/+bug/687406
When a piece of code containing a multiline macro construct with embedded asm
code is first preprocessed then compiled into an object or asm file, the
results are different than directly compiling them into an object file or asm
code.
The preprocessor step could take place when using -save-temps. It also happens
when using ccache or distcc.
Linux kernel arm parts have this kind of code at least in
local_irq_restore() [include/linux/irqflags.h]
-> raw_local_irq_restore() [arch/arm/include/asm/irqflags.h]
----
Result of example case without -save-temps:
.file "test.c"
.text
.globl optimized
.type optimized, @function
optimized:
.LFB0:
.cfi_startproc
#APP
# 15 "/tmp/test.c" 1
nop
# 0 "" 2
#NO_APP
ret
.cfi_endproc
.LFE0:
.size optimized, .-optimized
.ident "GCC: (GNU) 4.5.1"
.section .note.GNU-stack,"",@progbits
----
Result of example case with -save-temps:
.file "test.c"
.text
.globl optimized
.type optimized, @function
optimized:
.LFB0:
.cfi_startproc
testb $1, flags(%rip)
je .L2
#APP
# 15 "/tmp/test.c" 1
nop
# 0 "" 2
#NO_APP
ret
.L2:
#APP
# 15 "/tmp/test.c" 1
nop
# 0 "" 2
#NO_APP
ret
.cfi_endproc
.LFE0:
.size optimized, .-optimized
.ident "GCC: (GNU) 4.5.1"
.section .note.GNU-stack,"",@progbits
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug other/46865] Using -save-temps (or ccache, distcc) produces different results with multiline macros containing asm code
2010-12-09 13:52 [Bug other/46865] New: Using -save-temps (or ccache, distcc) produces different results with multiline macros containing asm code juha.kallioinen at nokia dot com
@ 2010-12-09 14:46 ` rguenth at gcc dot gnu.org
2010-12-09 14:51 ` [Bug other/46865] [4.3/4.4/4.5/4.6 Regression] " rguenth at gcc dot gnu.org
` (11 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: rguenth at gcc dot gnu.org @ 2010-12-09 14:46 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46865
Richard Guenther <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2010.12.09 14:46:05
Ever Confirmed|0 |1
--- Comment #1 from Richard Guenther <rguenth at gcc dot gnu.org> 2010-12-09 14:46:05 UTC ---
Cross jumping doesn't see instructions with different location as equivalent
it seems. Comparing the 195r.csa dumps:
--- test(3).c.195r.csa 2010-12-09 15:41:13.000000000 +0100
+++ tmp/test(3).c.195r.csa 2010-12-09 15:39:56.000000000 +0100
@@ -11,19 +11,50 @@
changing bb of uid 28
from 5 to 4
Merged 4 and 5 without moving.
+Cross jumping from bb 3 to bb 4; 1 common insns
+changing bb of uid 29
+ unscanned insn
+changing bb of uid 10
+ from 3 to 6
+changing bb of uid 26
+ from 3 to 6
+scanning new insn with uid = 30.
+deleting insn with uid = 29.
+deleting insn with uid = 10.
+deleting insn with uid = 26.
+deleting insn with uid = 22.
+deleting block 6
Thus, confirmed.
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug other/46865] [4.3/4.4/4.5/4.6 Regression] Using -save-temps (or ccache, distcc) produces different results with multiline macros containing asm code
2010-12-09 13:52 [Bug other/46865] New: Using -save-temps (or ccache, distcc) produces different results with multiline macros containing asm code juha.kallioinen at nokia dot com
2010-12-09 14:46 ` [Bug other/46865] " rguenth at gcc dot gnu.org
@ 2010-12-09 14:51 ` rguenth at gcc dot gnu.org
2010-12-09 18:49 ` [Bug rtl-optimization/46865] " jakub at gcc dot gnu.org
` (10 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: rguenth at gcc dot gnu.org @ 2010-12-09 14:51 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46865
Richard Guenther <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Known to work| |4.1.2
Target Milestone|--- |4.3.6
Summary|Using -save-temps (or |[4.3/4.4/4.5/4.6
|ccache, distcc) produces |Regression] Using
|different results with |-save-temps (or ccache,
|multiline macros containing |distcc) produces different
|asm code |results with multiline
| |macros containing asm code
Known to fail| |4.5.1, 4.6.0
--- Comment #2 from Richard Guenther <rguenth at gcc dot gnu.org> 2010-12-09 14:50:45 UTC ---
Works ok with 4.1.
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug rtl-optimization/46865] [4.3/4.4/4.5/4.6 Regression] Using -save-temps (or ccache, distcc) produces different results with multiline macros containing asm code
2010-12-09 13:52 [Bug other/46865] New: Using -save-temps (or ccache, distcc) produces different results with multiline macros containing asm code juha.kallioinen at nokia dot com
2010-12-09 14:46 ` [Bug other/46865] " rguenth at gcc dot gnu.org
2010-12-09 14:51 ` [Bug other/46865] [4.3/4.4/4.5/4.6 Regression] " rguenth at gcc dot gnu.org
@ 2010-12-09 18:49 ` jakub at gcc dot gnu.org
2010-12-09 19:11 ` jakub at gcc dot gnu.org
` (9 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: jakub at gcc dot gnu.org @ 2010-12-09 18:49 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46865
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
CC| |jakub at gcc dot gnu.org
Component|other |rtl-optimization
AssignedTo|unassigned at gcc dot |jakub at gcc dot gnu.org
|gnu.org |
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug rtl-optimization/46865] [4.3/4.4/4.5/4.6 Regression] Using -save-temps (or ccache, distcc) produces different results with multiline macros containing asm code
2010-12-09 13:52 [Bug other/46865] New: Using -save-temps (or ccache, distcc) produces different results with multiline macros containing asm code juha.kallioinen at nokia dot com
` (2 preceding siblings ...)
2010-12-09 18:49 ` [Bug rtl-optimization/46865] " jakub at gcc dot gnu.org
@ 2010-12-09 19:11 ` jakub at gcc dot gnu.org
2010-12-10 12:44 ` jakub at gcc dot gnu.org
` (8 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: jakub at gcc dot gnu.org @ 2010-12-09 19:11 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46865
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> 2010-12-09 19:11:08 UTC ---
Created attachment 22698
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22698
gcc46-pr46865.patch
The problem is that we do not guarantee the rtl locators are unique, locator_eq
needs to be called to check equality.
Perhaps for 4.7 a better way would be to use a different fmt string letter for
these locations and adjust all routines that look at rtl format strings.
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug rtl-optimization/46865] [4.3/4.4/4.5/4.6 Regression] Using -save-temps (or ccache, distcc) produces different results with multiline macros containing asm code
2010-12-09 13:52 [Bug other/46865] New: Using -save-temps (or ccache, distcc) produces different results with multiline macros containing asm code juha.kallioinen at nokia dot com
` (3 preceding siblings ...)
2010-12-09 19:11 ` jakub at gcc dot gnu.org
@ 2010-12-10 12:44 ` jakub at gcc dot gnu.org
2010-12-10 12:46 ` [Bug rtl-optimization/46865] [4.3/4.4/4.5 " jakub at gcc dot gnu.org
` (7 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: jakub at gcc dot gnu.org @ 2010-12-10 12:44 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46865
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> 2010-12-10 12:43:49 UTC ---
Author: jakub
Date: Fri Dec 10 12:43:45 2010
New Revision: 167686
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=167686
Log:
PR rtl-optimization/46865
* rtl.c (rtx_equal_p_cb, rtx_equal_p): For last operand of
ASM_OPERANDS and ASM_INPUT if integers are different,
call locator_eq.
* jump.c (rtx_renumbered_equal_p): Likewise.
* gcc.target/i386/pr46865-1.c: New test.
* gcc.target/i386/pr46865-2.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr46865-1.c
trunk/gcc/testsuite/gcc.target/i386/pr46865-2.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/jump.c
trunk/gcc/rtl.c
trunk/gcc/testsuite/ChangeLog
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug rtl-optimization/46865] [4.3/4.4/4.5 Regression] Using -save-temps (or ccache, distcc) produces different results with multiline macros containing asm code
2010-12-09 13:52 [Bug other/46865] New: Using -save-temps (or ccache, distcc) produces different results with multiline macros containing asm code juha.kallioinen at nokia dot com
` (4 preceding siblings ...)
2010-12-10 12:44 ` jakub at gcc dot gnu.org
@ 2010-12-10 12:46 ` jakub at gcc dot gnu.org
2010-12-10 13:14 ` juha.kallioinen at nokia dot com
` (6 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: jakub at gcc dot gnu.org @ 2010-12-10 12:46 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46865
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |4.6.0
Summary|[4.3/4.4/4.5/4.6 |[4.3/4.4/4.5 Regression]
|Regression] Using |Using -save-temps (or
|-save-temps (or ccache, |ccache, distcc) produces
|distcc) produces different |different results with
|results with multiline |multiline macros containing
|macros containing asm code |asm code
Known to fail|4.6.0 |
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> 2010-12-10 12:46:41 UTC ---
Fixed on the trunk so far.
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug rtl-optimization/46865] [4.3/4.4/4.5 Regression] Using -save-temps (or ccache, distcc) produces different results with multiline macros containing asm code
2010-12-09 13:52 [Bug other/46865] New: Using -save-temps (or ccache, distcc) produces different results with multiline macros containing asm code juha.kallioinen at nokia dot com
` (5 preceding siblings ...)
2010-12-10 12:46 ` [Bug rtl-optimization/46865] [4.3/4.4/4.5 " jakub at gcc dot gnu.org
@ 2010-12-10 13:14 ` juha.kallioinen at nokia dot com
2011-01-16 20:18 ` jakub at gcc dot gnu.org
` (5 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: juha.kallioinen at nokia dot com @ 2010-12-10 13:14 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46865
--- Comment #6 from Juha Kallioinen <juha.kallioinen at nokia dot com> 2010-12-10 13:14:14 UTC ---
Thanks for the quick work!
How does this get backported to 4.3 or 4.4 then? I can see the patch directly
applies to 4.5.1, but not to 4.4.5 (rtl.c: rtx_equal_p is too different in it).
If this backporting stuff is something I should just know then don't waste your
time explaining it in lenght, I can dig around :)
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug rtl-optimization/46865] [4.3/4.4/4.5 Regression] Using -save-temps (or ccache, distcc) produces different results with multiline macros containing asm code
2010-12-09 13:52 [Bug other/46865] New: Using -save-temps (or ccache, distcc) produces different results with multiline macros containing asm code juha.kallioinen at nokia dot com
` (6 preceding siblings ...)
2010-12-10 13:14 ` juha.kallioinen at nokia dot com
@ 2011-01-16 20:18 ` jakub at gcc dot gnu.org
2011-01-16 22:57 ` jakub at gcc dot gnu.org
` (4 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: jakub at gcc dot gnu.org @ 2011-01-16 20:18 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46865
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-01-16 20:14:53 UTC ---
Author: jakub
Date: Sun Jan 16 20:14:37 2011
New Revision: 168862
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=168862
Log:
Backport from mainline
2010-12-10 Jakub Jelinek <jakub@redhat.com>
PR rtl-optimization/46865
* rtl.c (rtx_equal_p_cb, rtx_equal_p): For last operand of
ASM_OPERANDS and ASM_INPUT if integers are different,
call locator_eq.
* jump.c (rtx_renumbered_equal_p): Likewise.
* gcc.target/i386/pr46865-1.c: New test.
* gcc.target/i386/pr46865-2.c: New test.
Added:
branches/gcc-4_5-branch/gcc/testsuite/gcc.target/i386/pr46865-1.c
branches/gcc-4_5-branch/gcc/testsuite/gcc.target/i386/pr46865-2.c
Modified:
branches/gcc-4_5-branch/gcc/ChangeLog
branches/gcc-4_5-branch/gcc/jump.c
branches/gcc-4_5-branch/gcc/rtl.c
branches/gcc-4_5-branch/gcc/testsuite/ChangeLog
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug rtl-optimization/46865] [4.3/4.4/4.5 Regression] Using -save-temps (or ccache, distcc) produces different results with multiline macros containing asm code
2010-12-09 13:52 [Bug other/46865] New: Using -save-temps (or ccache, distcc) produces different results with multiline macros containing asm code juha.kallioinen at nokia dot com
` (7 preceding siblings ...)
2011-01-16 20:18 ` jakub at gcc dot gnu.org
@ 2011-01-16 22:57 ` jakub at gcc dot gnu.org
2011-01-17 8:06 ` [Bug rtl-optimization/46865] [4.3 " jakub at gcc dot gnu.org
` (3 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: jakub at gcc dot gnu.org @ 2011-01-16 22:57 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46865
--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-01-16 22:53:13 UTC ---
Author: jakub
Date: Sun Jan 16 22:53:09 2011
New Revision: 168877
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=168877
Log:
Backport from mainline
2010-12-10 Jakub Jelinek <jakub@redhat.com>
PR rtl-optimization/46865
* rtl.c (rtx_equal_p_cb): For last operand of
ASM_OPERANDS and ASM_INPUT if integers are different,
call locator_eq.
* jump.c (rtx_renumbered_equal_p): Likewise.
* gcc.target/i386/pr46865-1.c: New test.
* gcc.target/i386/pr46865-2.c: New test.
Added:
branches/gcc-4_4-branch/gcc/testsuite/gcc.target/i386/pr46865-1.c
branches/gcc-4_4-branch/gcc/testsuite/gcc.target/i386/pr46865-2.c
Modified:
branches/gcc-4_4-branch/gcc/ChangeLog
branches/gcc-4_4-branch/gcc/jump.c
branches/gcc-4_4-branch/gcc/rtl.c
branches/gcc-4_4-branch/gcc/testsuite/ChangeLog
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug rtl-optimization/46865] [4.3 Regression] Using -save-temps (or ccache, distcc) produces different results with multiline macros containing asm code
2010-12-09 13:52 [Bug other/46865] New: Using -save-temps (or ccache, distcc) produces different results with multiline macros containing asm code juha.kallioinen at nokia dot com
` (8 preceding siblings ...)
2011-01-16 22:57 ` jakub at gcc dot gnu.org
@ 2011-01-17 8:06 ` jakub at gcc dot gnu.org
2011-05-11 6:09 ` feedback at launchpad dot net
` (2 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: jakub at gcc dot gnu.org @ 2011-01-17 8:06 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46865
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |4.4.6, 4.5.3
Summary|[4.3/4.4/4.5 Regression] |[4.3 Regression] Using
|Using -save-temps (or |-save-temps (or ccache,
|ccache, distcc) produces |distcc) produces different
|different results with |results with multiline
|multiline macros containing |macros containing asm code
|asm code |
--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-01-17 08:05:03 UTC ---
Fixed for 4.4+.
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug rtl-optimization/46865] [4.3 Regression] Using -save-temps (or ccache, distcc) produces different results with multiline macros containing asm code
2010-12-09 13:52 [Bug other/46865] New: Using -save-temps (or ccache, distcc) produces different results with multiline macros containing asm code juha.kallioinen at nokia dot com
` (9 preceding siblings ...)
2011-01-17 8:06 ` [Bug rtl-optimization/46865] [4.3 " jakub at gcc dot gnu.org
@ 2011-05-11 6:09 ` feedback at launchpad dot net
2011-06-27 10:46 ` rguenth at gcc dot gnu.org
2011-06-27 12:04 ` rguenth at gcc dot gnu.org
12 siblings, 0 replies; 14+ messages in thread
From: feedback at launchpad dot net @ 2011-05-11 6:09 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46865
--- Comment #10 from Launchpad <feedback at launchpad dot net> 2011-05-11 04:22:42 UTC ---
Christian Reis added the following comment to Launchpad bug report 687406:
Is this bug now resolved, or is it pending any other backports?
--
http://launchpad.net/bugs/687406
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug rtl-optimization/46865] [4.3 Regression] Using -save-temps (or ccache, distcc) produces different results with multiline macros containing asm code
2010-12-09 13:52 [Bug other/46865] New: Using -save-temps (or ccache, distcc) produces different results with multiline macros containing asm code juha.kallioinen at nokia dot com
` (10 preceding siblings ...)
2011-05-11 6:09 ` feedback at launchpad dot net
@ 2011-06-27 10:46 ` rguenth at gcc dot gnu.org
2011-06-27 12:04 ` rguenth at gcc dot gnu.org
12 siblings, 0 replies; 14+ messages in thread
From: rguenth at gcc dot gnu.org @ 2011-06-27 10:46 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46865
Richard Guenther <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug rtl-optimization/46865] [4.3 Regression] Using -save-temps (or ccache, distcc) produces different results with multiline macros containing asm code
2010-12-09 13:52 [Bug other/46865] New: Using -save-temps (or ccache, distcc) produces different results with multiline macros containing asm code juha.kallioinen at nokia dot com
` (11 preceding siblings ...)
2011-06-27 10:46 ` rguenth at gcc dot gnu.org
@ 2011-06-27 12:04 ` rguenth at gcc dot gnu.org
12 siblings, 0 replies; 14+ messages in thread
From: rguenth at gcc dot gnu.org @ 2011-06-27 12:04 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46865
Richard Guenther <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
Target Milestone|4.3.6 |4.4.6
--- Comment #11 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-06-27 12:01:32 UTC ---
Fixed for 4.4.6.
^ permalink raw reply [flat|nested] 14+ messages in thread
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2010-12-09 13:52 [Bug other/46865] New: Using -save-temps (or ccache, distcc) produces different results with multiline macros containing asm code juha.kallioinen at nokia dot com
2010-12-09 14:46 ` [Bug other/46865] " rguenth at gcc dot gnu.org
2010-12-09 14:51 ` [Bug other/46865] [4.3/4.4/4.5/4.6 Regression] " rguenth at gcc dot gnu.org
2010-12-09 18:49 ` [Bug rtl-optimization/46865] " jakub at gcc dot gnu.org
2010-12-09 19:11 ` jakub at gcc dot gnu.org
2010-12-10 12:44 ` jakub at gcc dot gnu.org
2010-12-10 12:46 ` [Bug rtl-optimization/46865] [4.3/4.4/4.5 " jakub at gcc dot gnu.org
2010-12-10 13:14 ` juha.kallioinen at nokia dot com
2011-01-16 20:18 ` jakub at gcc dot gnu.org
2011-01-16 22:57 ` jakub at gcc dot gnu.org
2011-01-17 8:06 ` [Bug rtl-optimization/46865] [4.3 " jakub at gcc dot gnu.org
2011-05-11 6:09 ` feedback at launchpad dot net
2011-06-27 10:46 ` rguenth at gcc dot gnu.org
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