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* [Bug target/36701] New: [4.4 Regression] unaligned access in gcc.c-torture/execute/complex-7.c
@ 2008-07-02 17:08 hjl dot tools at gmail dot com
2008-07-02 17:18 ` [Bug target/36701] " sje at cup dot hp dot com
` (15 more replies)
0 siblings, 16 replies; 17+ messages in thread
From: hjl dot tools at gmail dot com @ 2008-07-02 17:08 UTC (permalink / raw)
To: gcc-bugs
Revision 137328 generates unaligned access in
gcc.c-torture/execute/complex-7.c
and revision 137304 is OK. Steve, will your patch
http://gcc.gnu.org/ml/gcc-patches/2008-06/msg00884.html
cause this? Thanks.
--
Summary: [4.4 Regression] unaligned access in gcc.c-
torture/execute/complex-7.c
Product: gcc
Version: 4.4.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: hjl dot tools at gmail dot com
GCC target triplet: ia64-unknown-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36701
^ permalink raw reply [flat|nested] 17+ messages in thread
* [Bug target/36701] [4.4 Regression] unaligned access in gcc.c-torture/execute/complex-7.c
2008-07-02 17:08 [Bug target/36701] New: [4.4 Regression] unaligned access in gcc.c-torture/execute/complex-7.c hjl dot tools at gmail dot com
@ 2008-07-02 17:18 ` sje at cup dot hp dot com
2008-07-04 0:43 ` hjl dot tools at gmail dot com
` (14 subsequent siblings)
15 siblings, 0 replies; 17+ messages in thread
From: sje at cup dot hp dot com @ 2008-07-02 17:18 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from sje at cup dot hp dot com 2008-07-02 17:17 -------
I don't see any reason why my patch would cause this problem. Looking through
my old test logs I see this test failing before my patch as well as after it.
The failures go back to version 126651 which is the oldest results file I have
sitting around.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36701
^ permalink raw reply [flat|nested] 17+ messages in thread
* [Bug target/36701] [4.4 Regression] unaligned access in gcc.c-torture/execute/complex-7.c
2008-07-02 17:08 [Bug target/36701] New: [4.4 Regression] unaligned access in gcc.c-torture/execute/complex-7.c hjl dot tools at gmail dot com
2008-07-02 17:18 ` [Bug target/36701] " sje at cup dot hp dot com
@ 2008-07-04 0:43 ` hjl dot tools at gmail dot com
2008-07-04 3:15 ` drow at gcc dot gnu dot org
` (13 subsequent siblings)
15 siblings, 0 replies; 17+ messages in thread
From: hjl dot tools at gmail dot com @ 2008-07-04 0:43 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from hjl dot tools at gmail dot com 2008-07-04 00:42 -------
Revision 137326:
http://gcc.gnu.org/ml/gcc-cvs/2008-07/msg00030.html
may be the cause. It may be related to
http://gcc.gnu.org/ml/gcc-patches/2008-07/msg00219.html
--
hjl dot tools at gmail dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |drow at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36701
^ permalink raw reply [flat|nested] 17+ messages in thread
* [Bug target/36701] [4.4 Regression] unaligned access in gcc.c-torture/execute/complex-7.c
2008-07-02 17:08 [Bug target/36701] New: [4.4 Regression] unaligned access in gcc.c-torture/execute/complex-7.c hjl dot tools at gmail dot com
2008-07-02 17:18 ` [Bug target/36701] " sje at cup dot hp dot com
2008-07-04 0:43 ` hjl dot tools at gmail dot com
@ 2008-07-04 3:15 ` drow at gcc dot gnu dot org
2008-07-04 21:55 ` jsm28 at gcc dot gnu dot org
` (12 subsequent siblings)
15 siblings, 0 replies; 17+ messages in thread
From: drow at gcc dot gnu dot org @ 2008-07-04 3:15 UTC (permalink / raw)
To: gcc-bugs
------- Comment #3 from drow at gcc dot gnu dot org 2008-07-04 03:14 -------
Does the new function do anything on this test case? What are the various
incoming modes (nominal, promoted) and the actual RTX?
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36701
^ permalink raw reply [flat|nested] 17+ messages in thread
* [Bug target/36701] [4.4 Regression] unaligned access in gcc.c-torture/execute/complex-7.c
2008-07-02 17:08 [Bug target/36701] New: [4.4 Regression] unaligned access in gcc.c-torture/execute/complex-7.c hjl dot tools at gmail dot com
` (2 preceding siblings ...)
2008-07-04 3:15 ` drow at gcc dot gnu dot org
@ 2008-07-04 21:55 ` jsm28 at gcc dot gnu dot org
2008-07-07 17:51 ` hjl dot tools at gmail dot com
` (11 subsequent siblings)
15 siblings, 0 replies; 17+ messages in thread
From: jsm28 at gcc dot gnu dot org @ 2008-07-04 21:55 UTC (permalink / raw)
To: gcc-bugs
--
jsm28 at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |4.4.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36701
^ permalink raw reply [flat|nested] 17+ messages in thread
* [Bug target/36701] [4.4 Regression] unaligned access in gcc.c-torture/execute/complex-7.c
2008-07-02 17:08 [Bug target/36701] New: [4.4 Regression] unaligned access in gcc.c-torture/execute/complex-7.c hjl dot tools at gmail dot com
` (3 preceding siblings ...)
2008-07-04 21:55 ` jsm28 at gcc dot gnu dot org
@ 2008-07-07 17:51 ` hjl dot tools at gmail dot com
2008-07-07 19:38 ` hjl dot tools at gmail dot com
` (10 subsequent siblings)
15 siblings, 0 replies; 17+ messages in thread
From: hjl dot tools at gmail dot com @ 2008-07-07 17:51 UTC (permalink / raw)
To: gcc-bugs
------- Comment #4 from hjl dot tools at gmail dot com 2008-07-07 17:50 -------
Revision 137575 is the cause and revision 137575 doesn't help.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36701
^ permalink raw reply [flat|nested] 17+ messages in thread
* [Bug target/36701] [4.4 Regression] unaligned access in gcc.c-torture/execute/complex-7.c
2008-07-02 17:08 [Bug target/36701] New: [4.4 Regression] unaligned access in gcc.c-torture/execute/complex-7.c hjl dot tools at gmail dot com
` (4 preceding siblings ...)
2008-07-07 17:51 ` hjl dot tools at gmail dot com
@ 2008-07-07 19:38 ` hjl dot tools at gmail dot com
2008-07-07 22:25 ` hjl dot tools at gmail dot com
` (9 subsequent siblings)
15 siblings, 0 replies; 17+ messages in thread
From: hjl dot tools at gmail dot com @ 2008-07-07 19:38 UTC (permalink / raw)
To: gcc-bugs
------- Comment #5 from hjl dot tools at gmail dot com 2008-07-07 19:37 -------
A small testcase:
[hjl@gnu-14 good]$ cat ../complex-7.c
volatile _Complex float f1 = 1.1f + 2.2if;
volatile _Complex float f2 = 3.3f + 4.4if;
volatile _Complex float f3 = 5.5f + 6.6if;
volatile _Complex float f4 = 7.7f + 8.8if;
volatile _Complex float f5 = 9.9f + 10.1if;
extern void abort (void);
extern void exit (int);
__attribute__((noinline)) void
check_float (int a, _Complex float a1, _Complex float a2,
_Complex float a3, _Complex float a4, _Complex float a5)
{
if (a1 != f1 || a2 != f2 || a3 != f3 || a4 != f4 || a5 != f5)
abort ();
}
int
main (void)
{
check_float (0, f1, f2, f3, f4, f5);
exit (0);
}
[hjl@gnu-14 good]$
diff -upr bad/complex-7.c.133r.expand good/complex-7.c.133r.expand
--- bad/complex-7.c.133r.expand 2008-07-07 12:33:14.000000000 -0700
+++ good/complex-7.c.133r.expand 2008-07-07 12:33:40.000000000 -0700
@@ -5,115 +5,115 @@
;; Generating RTL for tree basic block 2
;; D.1272 = REALPART_EXPR <a1>
-(insn 62 61 63 ../complex-7.c:14 (set (reg:DI 419)
+(insn 42 41 43 ../complex-7.c:14 (set (reg:DI 401)
(reg/f:DI 335 virtual-stack-vars)) -1 (nil))
-(insn 63 62 64 ../complex-7.c:14 (set (reg/f:DI 420)
+(insn 43 42 44 ../complex-7.c:14 (set (reg/f:DI 402)
(plus:DI (reg/f:DI 335 virtual-stack-vars)
- (const_int 4 [0x4]))) -1 (nil))
+ (const_int 8 [0x8]))) -1 (nil))
-(insn 64 63 0 ../complex-7.c:14 (set (reg:SF 373 [ D.1272 ])
- (mem/s/c:SF (reg/f:DI 420) [0 a1+0 S4 A32])) -1 (nil))
+(insn 44 43 0 ../complex-7.c:14 (set (reg:SF 373 [ D.1272 ])
+ (mem/s/c:SF (reg/f:DI 402) [0 a1+0 S4 A64])) -1 (nil))
The alignment of the first argument passed on stack is wrong.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36701
^ permalink raw reply [flat|nested] 17+ messages in thread
* [Bug target/36701] [4.4 Regression] unaligned access in gcc.c-torture/execute/complex-7.c
2008-07-02 17:08 [Bug target/36701] New: [4.4 Regression] unaligned access in gcc.c-torture/execute/complex-7.c hjl dot tools at gmail dot com
` (5 preceding siblings ...)
2008-07-07 19:38 ` hjl dot tools at gmail dot com
@ 2008-07-07 22:25 ` hjl dot tools at gmail dot com
2008-07-07 22:32 ` drow at gcc dot gnu dot org
` (8 subsequent siblings)
15 siblings, 0 replies; 17+ messages in thread
From: hjl dot tools at gmail dot com @ 2008-07-07 22:25 UTC (permalink / raw)
To: gcc-bugs
------- Comment #6 from hjl dot tools at gmail dot com 2008-07-07 22:25 -------
assign_parm_remove_parallels:
if (GET_CODE (entry_parm) == PARALLEL && GET_MODE (entry_parm) != BLKmode)
{
rtx parmreg = gen_reg_rtx (GET_MODE (entry_parm));
emit_group_store (parmreg, entry_parm, NULL_TREE,
GET_MODE_SIZE (GET_MODE (entry_parm)));
entry_parm = parmreg;
}
is incorrect for ia64 HFA. You can't do
rtx parmreg = gen_reg_rtx (GET_MODE (entry_parm));
when entry_parm is HFA passed in GR:
(parallel:SC [
(expr_list:REG_DEP_TRUE (reg:DI 117 in5 [ a5 ])
(const_int 0 [0x0]))
])
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36701
^ permalink raw reply [flat|nested] 17+ messages in thread
* [Bug target/36701] [4.4 Regression] unaligned access in gcc.c-torture/execute/complex-7.c
2008-07-02 17:08 [Bug target/36701] New: [4.4 Regression] unaligned access in gcc.c-torture/execute/complex-7.c hjl dot tools at gmail dot com
` (6 preceding siblings ...)
2008-07-07 22:25 ` hjl dot tools at gmail dot com
@ 2008-07-07 22:32 ` drow at gcc dot gnu dot org
2008-07-08 1:20 ` hjl dot tools at gmail dot com
` (7 subsequent siblings)
15 siblings, 0 replies; 17+ messages in thread
From: drow at gcc dot gnu dot org @ 2008-07-07 22:32 UTC (permalink / raw)
To: gcc-bugs
------- Comment #7 from drow at gcc dot gnu dot org 2008-07-07 22:31 -------
Subject: Re: [4.4 Regression] unaligned access in
gcc.c-torture/execute/complex-7.c
On Mon, Jul 07, 2008 at 10:25:08PM -0000, hjl dot tools at gmail dot com wrote:
> is incorrect for ia64 HFA. You can't do
>
> rtx parmreg = gen_reg_rtx (GET_MODE (entry_parm));
>
> when entry_parm is HFA passed in GR:
What does HFA mean? Why can't you copy it into a reg:SC? This shouldn't
change the incoming location of the argument; it's generating code at
the start of the function to retrieve the argument.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36701
^ permalink raw reply [flat|nested] 17+ messages in thread
* [Bug target/36701] [4.4 Regression] unaligned access in gcc.c-torture/execute/complex-7.c
2008-07-02 17:08 [Bug target/36701] New: [4.4 Regression] unaligned access in gcc.c-torture/execute/complex-7.c hjl dot tools at gmail dot com
` (7 preceding siblings ...)
2008-07-07 22:32 ` drow at gcc dot gnu dot org
@ 2008-07-08 1:20 ` hjl dot tools at gmail dot com
2008-07-08 19:56 ` hjl dot tools at gmail dot com
` (6 subsequent siblings)
15 siblings, 0 replies; 17+ messages in thread
From: hjl dot tools at gmail dot com @ 2008-07-08 1:20 UTC (permalink / raw)
To: gcc-bugs
------- Comment #8 from hjl dot tools at gmail dot com 2008-07-08 01:19 -------
HFA stands for homogeneous floating point aggregates as specified in
IA-64 Software Conventions and Runtime Architecture Guide. To pass
complex float, if we run out of available FP argument registers,
we will pass it in GP register. For a simple testcase:
---
extern _Complex float f5;
int
check_float (int a, _Complex float a1, _Complex float a2,
_Complex float a3, _Complex float a4, _Complex float a5)
{
return (a5 != f5);
}
---
(gdb) call debug_rtx (entry_parm)
(parallel:SC [
(expr_list:REG_DEP_TRUE (reg:DI 117 in5 [ a5 ])
(const_int 0 [0x0]))
])
Here DI is 64bit with 8byte alignment.
rtx parmreg = gen_reg_rtx (GET_MODE (entry_parm));
turns it into
(concat:SC (reg:SF 380)
(reg:SF 381))
It has 4 byte alignment.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36701
^ permalink raw reply [flat|nested] 17+ messages in thread
* [Bug target/36701] [4.4 Regression] unaligned access in gcc.c-torture/execute/complex-7.c
2008-07-02 17:08 [Bug target/36701] New: [4.4 Regression] unaligned access in gcc.c-torture/execute/complex-7.c hjl dot tools at gmail dot com
` (8 preceding siblings ...)
2008-07-08 1:20 ` hjl dot tools at gmail dot com
@ 2008-07-08 19:56 ` hjl dot tools at gmail dot com
2008-07-08 20:27 ` drow at gcc dot gnu dot org
` (5 subsequent siblings)
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From: hjl dot tools at gmail dot com @ 2008-07-08 19:56 UTC (permalink / raw)
To: gcc-bugs
------- Comment #9 from hjl dot tools at gmail dot com 2008-07-08 19:55 -------
When emit_group_store allocates stack temp to copy from register
to stack, it should use the mode with the largest alignment. Does
this patch make sense?
--- expr.c.align 2008-07-02 11:56:29.000000000 -0700
+++ expr.c 2008-07-08 12:48:40.000000000 -0700
@@ -2074,10 +2074,28 @@ emit_group_store (rtx orig_dst, rtx src,
else
{
gcc_assert (bytepos == 0 && XVECLEN (src, 0));
- dest = assign_stack_temp (GET_MODE (dest),
- GET_MODE_SIZE (GET_MODE (dest)), 0);
- emit_move_insn (adjust_address (dest, GET_MODE (tmps[i]),
bytepos),
- tmps[i]);
+ enum machine_mode dest_mode = GET_MODE (dest);
+ enum machine_mode tmp_mode = GET_MODE (tmps[i]);
+
+ if (GET_MODE_ALIGNMENT (dest_mode)
+ >= GET_MODE_ALIGNMENT (tmp_mode))
+ {
+ dest = assign_stack_temp (dest_mode,
+ GET_MODE_SIZE (dest_mode),
+ 0);
+ emit_move_insn (adjust_address (dest,
+ tmp_mode,
+ bytepos),
+ tmps[i]);
+ }
+ else
+ {
+ dest = assign_stack_temp (tmp_mode,
+ GET_MODE_SIZE (dest_mode),
+ 0);
+ emit_move_insn (dest, tmps[i]);
+ dest = adjust_address (dest, dest_mode, bytepos);
+ }
dst = dest;
break;
}
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36701
^ permalink raw reply [flat|nested] 17+ messages in thread
* [Bug target/36701] [4.4 Regression] unaligned access in gcc.c-torture/execute/complex-7.c
2008-07-02 17:08 [Bug target/36701] New: [4.4 Regression] unaligned access in gcc.c-torture/execute/complex-7.c hjl dot tools at gmail dot com
` (9 preceding siblings ...)
2008-07-08 19:56 ` hjl dot tools at gmail dot com
@ 2008-07-08 20:27 ` drow at gcc dot gnu dot org
2008-07-08 22:05 ` [Bug middle-end/36701] " hjl dot tools at gmail dot com
` (4 subsequent siblings)
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From: drow at gcc dot gnu dot org @ 2008-07-08 20:27 UTC (permalink / raw)
To: gcc-bugs
------- Comment #10 from drow at gcc dot gnu dot org 2008-07-08 20:26 -------
Subject: Re: [4.4 Regression] unaligned access in
gcc.c-torture/execute/complex-7.c
It sounds plausible but I suggest you ask on gcc-patches, I can't
review that.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36701
^ permalink raw reply [flat|nested] 17+ messages in thread
* [Bug middle-end/36701] [4.4 Regression] unaligned access in gcc.c-torture/execute/complex-7.c
2008-07-02 17:08 [Bug target/36701] New: [4.4 Regression] unaligned access in gcc.c-torture/execute/complex-7.c hjl dot tools at gmail dot com
` (10 preceding siblings ...)
2008-07-08 20:27 ` drow at gcc dot gnu dot org
@ 2008-07-08 22:05 ` hjl dot tools at gmail dot com
2008-07-18 16:57 ` rguenth at gcc dot gnu dot org
` (3 subsequent siblings)
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From: hjl dot tools at gmail dot com @ 2008-07-08 22:05 UTC (permalink / raw)
To: gcc-bugs
------- Comment #11 from hjl dot tools at gmail dot com 2008-07-08 22:04 -------
A patch is posted at
http://gcc.gnu.org/ml/gcc-patches/2008-07/msg00671.html
--
hjl dot tools at gmail dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
URL| |http://gcc.gnu.org/ml/gcc-
| |patches/2008-
| |07/msg00671.html
Component|target |middle-end
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36701
^ permalink raw reply [flat|nested] 17+ messages in thread
* [Bug middle-end/36701] [4.4 Regression] unaligned access in gcc.c-torture/execute/complex-7.c
2008-07-02 17:08 [Bug target/36701] New: [4.4 Regression] unaligned access in gcc.c-torture/execute/complex-7.c hjl dot tools at gmail dot com
` (11 preceding siblings ...)
2008-07-08 22:05 ` [Bug middle-end/36701] " hjl dot tools at gmail dot com
@ 2008-07-18 16:57 ` rguenth at gcc dot gnu dot org
2008-07-27 19:11 ` hjl dot tools at gmail dot com
` (2 subsequent siblings)
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From: rguenth at gcc dot gnu dot org @ 2008-07-18 16:57 UTC (permalink / raw)
To: gcc-bugs
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Priority|P3 |P1
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36701
^ permalink raw reply [flat|nested] 17+ messages in thread
* [Bug middle-end/36701] [4.4 Regression] unaligned access in gcc.c-torture/execute/complex-7.c
2008-07-02 17:08 [Bug target/36701] New: [4.4 Regression] unaligned access in gcc.c-torture/execute/complex-7.c hjl dot tools at gmail dot com
` (12 preceding siblings ...)
2008-07-18 16:57 ` rguenth at gcc dot gnu dot org
@ 2008-07-27 19:11 ` hjl dot tools at gmail dot com
2008-08-13 16:23 ` hjl at gcc dot gnu dot org
2008-08-13 18:03 ` hjl dot tools at gmail dot com
15 siblings, 0 replies; 17+ messages in thread
From: hjl dot tools at gmail dot com @ 2008-07-27 19:11 UTC (permalink / raw)
To: gcc-bugs
------- Comment #12 from hjl dot tools at gmail dot com 2008-07-27 19:11 -------
Jim, can you take a look at this patch?
--
hjl dot tools at gmail dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |wilson at tuliptree dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36701
^ permalink raw reply [flat|nested] 17+ messages in thread
* [Bug middle-end/36701] [4.4 Regression] unaligned access in gcc.c-torture/execute/complex-7.c
2008-07-02 17:08 [Bug target/36701] New: [4.4 Regression] unaligned access in gcc.c-torture/execute/complex-7.c hjl dot tools at gmail dot com
` (13 preceding siblings ...)
2008-07-27 19:11 ` hjl dot tools at gmail dot com
@ 2008-08-13 16:23 ` hjl at gcc dot gnu dot org
2008-08-13 18:03 ` hjl dot tools at gmail dot com
15 siblings, 0 replies; 17+ messages in thread
From: hjl at gcc dot gnu dot org @ 2008-08-13 16:23 UTC (permalink / raw)
To: gcc-bugs
------- Comment #13 from hjl at gcc dot gnu dot org 2008-08-13 16:22 -------
Subject: Bug 36701
Author: hjl
Date: Wed Aug 13 16:20:42 2008
New Revision: 139062
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=139062
Log:
2008-08-13 H.J. Lu <hongjiu.lu@intel.com>
PR middle-end/36701
* expr.c (emit_group_store): Allocate stack temp with the
largest alignment when copying from register to stack.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/expr.c
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36701
^ permalink raw reply [flat|nested] 17+ messages in thread
* [Bug middle-end/36701] [4.4 Regression] unaligned access in gcc.c-torture/execute/complex-7.c
2008-07-02 17:08 [Bug target/36701] New: [4.4 Regression] unaligned access in gcc.c-torture/execute/complex-7.c hjl dot tools at gmail dot com
` (14 preceding siblings ...)
2008-08-13 16:23 ` hjl at gcc dot gnu dot org
@ 2008-08-13 18:03 ` hjl dot tools at gmail dot com
15 siblings, 0 replies; 17+ messages in thread
From: hjl dot tools at gmail dot com @ 2008-08-13 18:03 UTC (permalink / raw)
To: gcc-bugs
------- Comment #14 from hjl dot tools at gmail dot com 2008-08-13 18:01 -------
Fixed.
--
hjl dot tools at gmail dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution| |FIXED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36701
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2008-07-02 17:08 [Bug target/36701] New: [4.4 Regression] unaligned access in gcc.c-torture/execute/complex-7.c hjl dot tools at gmail dot com
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