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* [Bug rtl-optimization/19331] New: [4.0 Regression] Inefficient code generated for bitfield assignment
@ 2005-01-08 18:24 giovannibajo at libero dot it
2005-01-08 18:24 ` [Bug rtl-optimization/19331] " giovannibajo at libero dot it
` (15 more replies)
0 siblings, 16 replies; 17+ messages in thread
From: giovannibajo at libero dot it @ 2005-01-08 18:24 UTC (permalink / raw)
To: gcc-bugs
The attached testcase shows a code generation regression which can be seen on
x86 but I believe it to be target indepedent.
The code is copying data between two structures, both of which contain
bitfields. The source structure uses 1-bit bitfields of type "int", while the
destination structure uses 1-bit bitfields of type "_Bool". At the end of the
tree optimizers, the code looks like this:
params.cliplmt_ch1 = (int) msg.cliplmt_ch1 != 0;
params.cliplmt_ch2 = (int) msg.cliplmt_ch2 != 0;
params.gate_ch1 = (int) msg.gate_ch1 != 0;
params.gate_ch2 = (int) msg.gate_ch2 != 0;
The problem is that the comparison with zero is never removed by the
optimizers. The generated code looks like this:
testb $1, %bl
setne %cl
In 3.4, instead, the generated code looks better:
andl $1, %ebx
Notice this this does not happen in C++ (using a "bool" bitfield instead
of "_Bool"). We get a BITFIELD_REF there:
D.1643 = BIT_FIELD_REF <msg, 8, 40>;
params.cliplmt_ch1 = (D.1643 & 1) != 0;
params.cliplmt_ch2 = (D.1643 & 2) != 0;
params.gate_ch1 = (D.1643 & 4) != 0;
params.gate_ch2 = (D.1643 & 8) != 0;
and the generated code is optimal.
--
Summary: [4.0 Regression] Inefficient code generated for bitfield
assignment
Product: gcc
Version: unknown
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: normal
Priority: P2
Component: rtl-optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: giovannibajo at libero dot it
CC: aleph at develer dot com,bernie at develer dot com,gcc-
bugs at gcc dot gnu dot org,sayle at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19331
^ permalink raw reply [flat|nested] 17+ messages in thread
* [Bug rtl-optimization/19331] [4.0 Regression] Inefficient code generated for bitfield assignment
2005-01-08 18:24 [Bug rtl-optimization/19331] New: [4.0 Regression] Inefficient code generated for bitfield assignment giovannibajo at libero dot it
@ 2005-01-08 18:24 ` giovannibajo at libero dot it
2005-01-08 18:26 ` pinskia at gcc dot gnu dot org
` (14 subsequent siblings)
15 siblings, 0 replies; 17+ messages in thread
From: giovannibajo at libero dot it @ 2005-01-08 18:24 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From giovannibajo at libero dot it 2005-01-08 18:24 -------
Created an attachment (id=7900)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=7900&action=view)
Testcase
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19331
^ permalink raw reply [flat|nested] 17+ messages in thread
* [Bug rtl-optimization/19331] [4.0 Regression] Inefficient code generated for bitfield assignment
2005-01-08 18:24 [Bug rtl-optimization/19331] New: [4.0 Regression] Inefficient code generated for bitfield assignment giovannibajo at libero dot it
2005-01-08 18:24 ` [Bug rtl-optimization/19331] " giovannibajo at libero dot it
@ 2005-01-08 18:26 ` pinskia at gcc dot gnu dot org
2005-01-08 18:27 ` giovannibajo at libero dot it
` (13 subsequent siblings)
15 siblings, 0 replies; 17+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-01-08 18:26 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2005-01-08 18:26 -------
I think this is related to PR 18008 (or maybe even a dup).
--
What |Removed |Added
----------------------------------------------------------------------------
CC| |pinskia at gcc dot gnu dot
| |org
Severity|normal |minor
Priority|P2 |P3
Target Milestone|--- |4.0.0
Version|unknown |4.0.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19331
^ permalink raw reply [flat|nested] 17+ messages in thread
* [Bug rtl-optimization/19331] [4.0 Regression] Inefficient code generated for bitfield assignment
2005-01-08 18:24 [Bug rtl-optimization/19331] New: [4.0 Regression] Inefficient code generated for bitfield assignment giovannibajo at libero dot it
2005-01-08 18:24 ` [Bug rtl-optimization/19331] " giovannibajo at libero dot it
2005-01-08 18:26 ` pinskia at gcc dot gnu dot org
@ 2005-01-08 18:27 ` giovannibajo at libero dot it
2005-01-08 18:28 ` [Bug middle-end/19331] " pinskia at gcc dot gnu dot org
` (12 subsequent siblings)
15 siblings, 0 replies; 17+ messages in thread
From: giovannibajo at libero dot it @ 2005-01-08 18:27 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From giovannibajo at libero dot it 2005-01-08 18:27 -------
Created an attachment (id=7901)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=7901&action=view)
Testcase (the other was wrong)
--
What |Removed |Added
----------------------------------------------------------------------------
Attachment #7900 is|0 |1
obsolete| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19331
^ permalink raw reply [flat|nested] 17+ messages in thread
* [Bug middle-end/19331] [4.0 Regression] Inefficient code generated for bitfield assignment
2005-01-08 18:24 [Bug rtl-optimization/19331] New: [4.0 Regression] Inefficient code generated for bitfield assignment giovannibajo at libero dot it
` (4 preceding siblings ...)
2005-01-08 18:28 ` [Bug rtl-optimization/19331] " giovannibajo at libero dot it
@ 2005-01-08 18:28 ` giovannibajo at libero dot it
2005-01-08 18:37 ` pinskia at gcc dot gnu dot org
` (9 subsequent siblings)
15 siblings, 0 replies; 17+ messages in thread
From: giovannibajo at libero dot it @ 2005-01-08 18:28 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From giovannibajo at libero dot it 2005-01-08 18:28 -------
Created an attachment (id=7903)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=7903&action=view)
Efficient code generated with 3.4
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19331
^ permalink raw reply [flat|nested] 17+ messages in thread
* [Bug middle-end/19331] [4.0 Regression] Inefficient code generated for bitfield assignment
2005-01-08 18:24 [Bug rtl-optimization/19331] New: [4.0 Regression] Inefficient code generated for bitfield assignment giovannibajo at libero dot it
` (2 preceding siblings ...)
2005-01-08 18:27 ` giovannibajo at libero dot it
@ 2005-01-08 18:28 ` pinskia at gcc dot gnu dot org
2005-01-08 18:28 ` [Bug rtl-optimization/19331] " giovannibajo at libero dot it
` (11 subsequent siblings)
15 siblings, 0 replies; 17+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-01-08 18:28 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2005-01-08 18:28 -------
Also I think it comes changing the C front-end representation of bitfields to be more correct.
--
What |Removed |Added
----------------------------------------------------------------------------
Component|rtl-optimization |middle-end
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19331
^ permalink raw reply [flat|nested] 17+ messages in thread
* [Bug rtl-optimization/19331] [4.0 Regression] Inefficient code generated for bitfield assignment
2005-01-08 18:24 [Bug rtl-optimization/19331] New: [4.0 Regression] Inefficient code generated for bitfield assignment giovannibajo at libero dot it
` (3 preceding siblings ...)
2005-01-08 18:28 ` [Bug middle-end/19331] " pinskia at gcc dot gnu dot org
@ 2005-01-08 18:28 ` giovannibajo at libero dot it
2005-01-08 18:28 ` [Bug middle-end/19331] " giovannibajo at libero dot it
` (10 subsequent siblings)
15 siblings, 0 replies; 17+ messages in thread
From: giovannibajo at libero dot it @ 2005-01-08 18:28 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From giovannibajo at libero dot it 2005-01-08 18:28 -------
Created an attachment (id=7902)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=7902&action=view)
Inefficient code generated with 4.0
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19331
^ permalink raw reply [flat|nested] 17+ messages in thread
* [Bug middle-end/19331] [4.0 Regression] Inefficient code generated for bitfield assignment
2005-01-08 18:24 [Bug rtl-optimization/19331] New: [4.0 Regression] Inefficient code generated for bitfield assignment giovannibajo at libero dot it
` (5 preceding siblings ...)
2005-01-08 18:28 ` [Bug middle-end/19331] " giovannibajo at libero dot it
@ 2005-01-08 18:37 ` pinskia at gcc dot gnu dot org
2005-01-08 19:02 ` pinskia at gcc dot gnu dot org
` (8 subsequent siblings)
15 siblings, 0 replies; 17+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-01-08 18:37 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2005-01-08 18:37 -------
Hmm, on PPC, the mainline produces much better code than 3.3.2.
3.3.2:
lbz r6,69(r1)
la r2,lo16(_params)(r7)
lwz r3,48(r2)
addi r1,r1,80
rlwinm r5,r6,26,31,31
rlwinm r4,r6,27,31,31
rlwinm r0,r6,28,31,31
rlwimi r3,r6,23,1,1
rlwimi r3,r5,29,2,2
rlwimi r3,r4,28,3,3
rlwimi r3,r0,27,4,4
stw r3,48(r2)
mainline:
lwz r2,60(r1)
lwz r0,48(r9)
addi r1,r1,80
rlwimi r0,r2,7,1,1
rlwimi r0,r2,7,2,2
rlwimi r0,r2,7,3,3
rlwimi r0,r2,7,4,4
stw r0,48(r9)
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19331
^ permalink raw reply [flat|nested] 17+ messages in thread
* [Bug middle-end/19331] [4.0 Regression] Inefficient code generated for bitfield assignment
2005-01-08 18:24 [Bug rtl-optimization/19331] New: [4.0 Regression] Inefficient code generated for bitfield assignment giovannibajo at libero dot it
` (6 preceding siblings ...)
2005-01-08 18:37 ` pinskia at gcc dot gnu dot org
@ 2005-01-08 19:02 ` pinskia at gcc dot gnu dot org
2005-01-27 0:23 ` steven at gcc dot gnu dot org
` (7 subsequent siblings)
15 siblings, 0 replies; 17+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-01-08 19:02 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2005-01-08 19:02 -------
AVR also has the same problem, I have no idea where the problem is right now (I have to compare the
initial RTL).
--
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever Confirmed| |1
GCC target triplet| |i?86-*-* avr
Last reconfirmed|0000-00-00 00:00:00 |2005-01-08 19:02:41
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19331
^ permalink raw reply [flat|nested] 17+ messages in thread
* [Bug middle-end/19331] [4.0 Regression] Inefficient code generated for bitfield assignment
2005-01-08 18:24 [Bug rtl-optimization/19331] New: [4.0 Regression] Inefficient code generated for bitfield assignment giovannibajo at libero dot it
` (7 preceding siblings ...)
2005-01-08 19:02 ` pinskia at gcc dot gnu dot org
@ 2005-01-27 0:23 ` steven at gcc dot gnu dot org
2005-02-01 0:33 ` pinskia at gcc dot gnu dot org
` (6 subsequent siblings)
15 siblings, 0 replies; 17+ messages in thread
From: steven at gcc dot gnu dot org @ 2005-01-27 0:23 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From steven at gcc dot gnu dot org 2005-01-27 00:22 -------
Not fixed by the patch for PR18008
--
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed|2005-01-08 19:02:41 |2005-01-27 00:22:51
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19331
^ permalink raw reply [flat|nested] 17+ messages in thread
* [Bug middle-end/19331] [4.0 Regression] Inefficient code generated for bitfield assignment
2005-01-08 18:24 [Bug rtl-optimization/19331] New: [4.0 Regression] Inefficient code generated for bitfield assignment giovannibajo at libero dot it
` (8 preceding siblings ...)
2005-01-27 0:23 ` steven at gcc dot gnu dot org
@ 2005-02-01 0:33 ` pinskia at gcc dot gnu dot org
2005-02-01 5:57 ` pinskia at gcc dot gnu dot org
` (5 subsequent siblings)
15 siblings, 0 replies; 17+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-02-01 0:33 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2005-02-01 00:32 -------
This changed between 20040708 and 20040709.
Which means that it was most likely caused by:
2004-07-08 Joseph S. Myers <jsm@polyomino.org.uk>
Neil Booth <neil@daikokuya.co.uk>
PR c/2511
PR c/3325
Which is what I thought as we get optimial code from the C++ front-end for x86 though on ppc we get
the same optimial code for both the C and C++ front-ends.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19331
^ permalink raw reply [flat|nested] 17+ messages in thread
* [Bug middle-end/19331] [4.0 Regression] Inefficient code generated for bitfield assignment
2005-01-08 18:24 [Bug rtl-optimization/19331] New: [4.0 Regression] Inefficient code generated for bitfield assignment giovannibajo at libero dot it
` (9 preceding siblings ...)
2005-02-01 0:33 ` pinskia at gcc dot gnu dot org
@ 2005-02-01 5:57 ` pinskia at gcc dot gnu dot org
2005-03-13 15:08 ` [Bug middle-end/19331] [4.0/4.1 " giovannibajo at libero dot it
` (4 subsequent siblings)
15 siblings, 0 replies; 17+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-02-01 5:57 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2005-02-01 05:57 -------
Hmm, maybe gcc should be able to optimize the following RTL better when combining them (if gcc
does combine them):
(insn 19 18 20 0 (set (reg:CCZ 17 flags)
(compare:CCZ (zero_extract:SI (subreg:DI (reg:QI 61 [+5 ]) 0)
(const_int 1 [0x1])
(const_int 0 [0x0]))
(const_int 0 [0x0]))) 283 {*testqi_ext_3} (insn_list:REG_DEP_TRUE 16 (nil))
(nil))
...
(insn 23 22 24 0 (set (reg:QI 68)
(ne:QI (reg:CCZ 17 flags)
(const_int 0 [0x0]))) 480 {*setcc_1} (insn_list:REG_DEP_TRUE 19 (nil))
(expr_list:REG_DEAD (reg:CC 17 flags)
(nil)))
And we should get:
(set (reg:QI 68) (zero_extract:SI (subreg:DI (reg:QI 61 [+5 ]) 0)
(const_int 1 [0x1])
(const_int 0 [0x0])))
because we know that what the compare compares against can only be 1 or 0 as it is a zero_extract of
size 1.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19331
^ permalink raw reply [flat|nested] 17+ messages in thread
* [Bug middle-end/19331] [4.0/4.1 Regression] Inefficient code generated for bitfield assignment
2005-01-08 18:24 [Bug rtl-optimization/19331] New: [4.0 Regression] Inefficient code generated for bitfield assignment giovannibajo at libero dot it
` (10 preceding siblings ...)
2005-02-01 5:57 ` pinskia at gcc dot gnu dot org
@ 2005-03-13 15:08 ` giovannibajo at libero dot it
2005-03-13 22:34 ` cvs-commit at gcc dot gnu dot org
` (3 subsequent siblings)
15 siblings, 0 replies; 17+ messages in thread
From: giovannibajo at libero dot it @ 2005-03-13 15:08 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From giovannibajo at libero dot it 2005-03-13 15:08 -------
The above link is broken because of the gcc.gnu.org hd crash. Roger, I can't
understand if this bug was fixed or not. Can you elaborate?
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19331
^ permalink raw reply [flat|nested] 17+ messages in thread
* [Bug middle-end/19331] [4.0/4.1 Regression] Inefficient code generated for bitfield assignment
2005-01-08 18:24 [Bug rtl-optimization/19331] New: [4.0 Regression] Inefficient code generated for bitfield assignment giovannibajo at libero dot it
` (11 preceding siblings ...)
2005-03-13 15:08 ` [Bug middle-end/19331] [4.0/4.1 " giovannibajo at libero dot it
@ 2005-03-13 22:34 ` cvs-commit at gcc dot gnu dot org
2005-03-13 23:29 ` [Bug middle-end/19331] [4.0 " pinskia at gcc dot gnu dot org
` (2 subsequent siblings)
15 siblings, 0 replies; 17+ messages in thread
From: cvs-commit at gcc dot gnu dot org @ 2005-03-13 22:34 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From cvs-commit at gcc dot gnu dot org 2005-03-13 22:34 -------
Subject: Bug 19331
CVSROOT: /cvs/gcc
Module name: gcc
Changes by: sayle@gcc.gnu.org 2005-03-13 22:34:07
Modified files:
gcc : ChangeLog tree.c fold-const.c
Log message:
PR middle-end/19331
* tree.c (get_unwidened): Treat CONVERT_EXPR and NOP_EXPR identically.
* fold-const.c (fold_sign_changed_comparison): Likewise.
(fold_binary): Optimize comparisons against widened operands if
the extension is represented by a CONVERT_EXPR, same as a NOP_EXPR.
Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.7828&r2=2.7829
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree.c.diff?cvsroot=gcc&r1=1.467&r2=1.468
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/fold-const.c.diff?cvsroot=gcc&r1=1.541&r2=1.542
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19331
^ permalink raw reply [flat|nested] 17+ messages in thread
* [Bug middle-end/19331] [4.0 Regression] Inefficient code generated for bitfield assignment
2005-01-08 18:24 [Bug rtl-optimization/19331] New: [4.0 Regression] Inefficient code generated for bitfield assignment giovannibajo at libero dot it
` (12 preceding siblings ...)
2005-03-13 22:34 ` cvs-commit at gcc dot gnu dot org
@ 2005-03-13 23:29 ` pinskia at gcc dot gnu dot org
2005-03-14 3:49 ` cvs-commit at gcc dot gnu dot org
2005-03-14 3:58 ` pinskia at gcc dot gnu dot org
15 siblings, 0 replies; 17+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-03-13 23:29 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2005-03-13 23:29 -------
Fixed at least in 4.1.0.
--
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |3.4.4 4.1.0
Summary|[4.0/4.1 Regression] |[4.0 Regression] Inefficient
|Inefficient code generated |code generated for bitfield
|for bitfield assignment |assignment
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19331
^ permalink raw reply [flat|nested] 17+ messages in thread
* [Bug middle-end/19331] [4.0 Regression] Inefficient code generated for bitfield assignment
2005-01-08 18:24 [Bug rtl-optimization/19331] New: [4.0 Regression] Inefficient code generated for bitfield assignment giovannibajo at libero dot it
` (13 preceding siblings ...)
2005-03-13 23:29 ` [Bug middle-end/19331] [4.0 " pinskia at gcc dot gnu dot org
@ 2005-03-14 3:49 ` cvs-commit at gcc dot gnu dot org
2005-03-14 3:58 ` pinskia at gcc dot gnu dot org
15 siblings, 0 replies; 17+ messages in thread
From: cvs-commit at gcc dot gnu dot org @ 2005-03-14 3:49 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From cvs-commit at gcc dot gnu dot org 2005-03-14 03:48 -------
Subject: Bug 19331
CVSROOT: /cvs/gcc
Module name: gcc
Branch: gcc-4_0-branch
Changes by: sayle@gcc.gnu.org 2005-03-14 03:48:51
Modified files:
gcc : ChangeLog tree.c fold-const.c
Log message:
PR middle-end/19331
* tree.c (get_unwidened): Treat CONVERT_EXPR and NOP_EXPR identically.
* fold-const.c (fold_sign_changed_comparison): Likewise.
(fold_binary): Optimize comparisons against widened operands if
the extension is represented by a CONVERT_EXPR, same as a NOP_EXPR.
Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=2.7592.2.46&r2=2.7592.2.47
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree.c.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=1.466&r2=1.466.4.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/fold-const.c.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=1.517&r2=1.517.2.1
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19331
^ permalink raw reply [flat|nested] 17+ messages in thread
* [Bug middle-end/19331] [4.0 Regression] Inefficient code generated for bitfield assignment
2005-01-08 18:24 [Bug rtl-optimization/19331] New: [4.0 Regression] Inefficient code generated for bitfield assignment giovannibajo at libero dot it
` (14 preceding siblings ...)
2005-03-14 3:49 ` cvs-commit at gcc dot gnu dot org
@ 2005-03-14 3:58 ` pinskia at gcc dot gnu dot org
15 siblings, 0 replies; 17+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-03-14 3:58 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2005-03-14 03:58 -------
Fixed. Thanks Roger for looking into this bug and fixing it.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19331
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2005-01-08 18:24 [Bug rtl-optimization/19331] New: [4.0 Regression] Inefficient code generated for bitfield assignment giovannibajo at libero dot it
2005-01-08 18:24 ` [Bug rtl-optimization/19331] " giovannibajo at libero dot it
2005-01-08 18:26 ` pinskia at gcc dot gnu dot org
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2005-01-08 18:28 ` [Bug rtl-optimization/19331] " giovannibajo at libero dot it
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2005-03-13 15:08 ` [Bug middle-end/19331] [4.0/4.1 " giovannibajo at libero dot it
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