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* [Bug c/20127] New: wrong code for volatile struct members?
@ 2005-02-22 2:14 schlie at comcast dot net
2005-02-22 2:27 ` [Bug tree-optimization/20127] " pinskia at gcc dot gnu dot org
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: schlie at comcast dot net @ 2005-02-22 2:14 UTC (permalink / raw)
To: gcc-bugs
The following code does not treat volatile struct members as volatile,
assuming such declarations are valid; if not would exect a warning:
typedef struct {
volatile int a;
volatile int b;
} s;
int main (void){
s x = {0, 1};
s y = {2, 3};
x = y;
y = x;
return x.a + y.a;
}
generates:
000000c6 <main>:
volatile int a;
volatile int b;
} s;
int main (void){
c6: cf ef ldi r28, 0xFF ; 255
c8: d0 e1 ldi r29, 0x10 ; 16
ca: de bf out 0x3e, r29 ; 62
cc: cd bf out 0x3d, r28 ; 61
s x = {0, 1};
s y = {2, 3};
x = y;
y = x;
return x.a + y.a;
}
ce: 84 e0 ldi r24, 0x04 ; 4
d0: 90 e0 ldi r25, 0x00 ; 0
d2: 0c 94 6b 00 jmp 0xd6 <_exit>
--
Summary: wrong code for volatile struct members?
Product: gcc
Version: 4.0.0
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: schlie at comcast dot net
CC: gcc-bugs at gcc dot gnu dot org
GCC build triplet: ppc-apple-darwin7.8
GCC host triplet: ppc-apple-darwin7.8
GCC target triplet: avr-unknown-unknown
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20127
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/20127] wrong code for volatile struct members?
2005-02-22 2:14 [Bug c/20127] New: wrong code for volatile struct members? schlie at comcast dot net
@ 2005-02-22 2:27 ` pinskia at gcc dot gnu dot org
2005-02-25 2:33 ` [Bug tree-optimization/20127] [4.0 Regression] wrong code for volatile struct members rth at gcc dot gnu dot org
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-02-22 2:27 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2005-02-21 22:19 -------
Hmm, SRA creates new variables and then goes and makes them renamed which seems wrong.
--
What |Removed |Added
----------------------------------------------------------------------------
CC| |rth at gcc dot gnu dot org
Status|UNCONFIRMED |NEW
Component|c |tree-optimization
Ever Confirmed| |1
GCC build triplet|ppc-apple-darwin7.8 |
GCC host triplet|ppc-apple-darwin7.8 |
GCC target triplet|avr-unknown-unknown |
Keywords| |wrong-code
Last reconfirmed|0000-00-00 00:00:00 |2005-02-21 22:19:24
date| |
Target Milestone|--- |4.0.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20127
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/20127] [4.0 Regression] wrong code for volatile struct members
2005-02-22 2:14 [Bug c/20127] New: wrong code for volatile struct members? schlie at comcast dot net
2005-02-22 2:27 ` [Bug tree-optimization/20127] " pinskia at gcc dot gnu dot org
@ 2005-02-25 2:33 ` rth at gcc dot gnu dot org
2005-02-25 14:56 ` cvs-commit at gcc dot gnu dot org
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: rth at gcc dot gnu dot org @ 2005-02-25 2:33 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|unassigned at gcc dot gnu |rth at gcc dot gnu dot org
|dot org |
Status|NEW |ASSIGNED
Last reconfirmed|2005-02-21 22:19:24 |2005-02-24 21:59:32
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20127
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/20127] [4.0 Regression] wrong code for volatile struct members
2005-02-22 2:14 [Bug c/20127] New: wrong code for volatile struct members? schlie at comcast dot net
2005-02-22 2:27 ` [Bug tree-optimization/20127] " pinskia at gcc dot gnu dot org
2005-02-25 2:33 ` [Bug tree-optimization/20127] [4.0 Regression] wrong code for volatile struct members rth at gcc dot gnu dot org
@ 2005-02-25 14:56 ` cvs-commit at gcc dot gnu dot org
2005-02-25 15:02 ` rth at gcc dot gnu dot org
2005-02-25 15:03 ` schlie at comcast dot net
4 siblings, 0 replies; 6+ messages in thread
From: cvs-commit at gcc dot gnu dot org @ 2005-02-25 14:56 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From cvs-commit at gcc dot gnu dot org 2005-02-25 01:56 -------
Subject: Bug 20127
CVSROOT: /cvs/gcc
Module name: gcc
Changes by: rth@gcc.gnu.org 2005-02-25 01:56:18
Modified files:
gcc : ChangeLog tree-sra.c
Log message:
PR tree-opt/20127
* tree-sra.c (instantiate_element): Copy TREE_THIS_VOLATILE from
the type.
Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.7589&r2=2.7590
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-sra.c.diff?cvsroot=gcc&r1=2.52&r2=2.53
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20127
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/20127] [4.0 Regression] wrong code for volatile struct members
2005-02-22 2:14 [Bug c/20127] New: wrong code for volatile struct members? schlie at comcast dot net
` (2 preceding siblings ...)
2005-02-25 14:56 ` cvs-commit at gcc dot gnu dot org
@ 2005-02-25 15:02 ` rth at gcc dot gnu dot org
2005-02-25 15:03 ` schlie at comcast dot net
4 siblings, 0 replies; 6+ messages in thread
From: rth at gcc dot gnu dot org @ 2005-02-25 15:02 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From rth at gcc dot gnu dot org 2005-02-25 01:57 -------
Fixed.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20127
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/20127] [4.0 Regression] wrong code for volatile struct members
2005-02-22 2:14 [Bug c/20127] New: wrong code for volatile struct members? schlie at comcast dot net
` (3 preceding siblings ...)
2005-02-25 15:02 ` rth at gcc dot gnu dot org
@ 2005-02-25 15:03 ` schlie at comcast dot net
4 siblings, 0 replies; 6+ messages in thread
From: schlie at comcast dot net @ 2005-02-25 15:03 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From schlie at comcast dot net 2005-02-25 02:06 -------
Subject: Re: [4.0 Regression] wrong code for
volatile struct members
Additional Comments From rth at gcc dot gnu dot org 2005-02-25 01:57
> -------
> Fixed.
>
> --
Thank you.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20127
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2005-02-25 2:06 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
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2005-02-22 2:14 [Bug c/20127] New: wrong code for volatile struct members? schlie at comcast dot net
2005-02-22 2:27 ` [Bug tree-optimization/20127] " pinskia at gcc dot gnu dot org
2005-02-25 2:33 ` [Bug tree-optimization/20127] [4.0 Regression] wrong code for volatile struct members rth at gcc dot gnu dot org
2005-02-25 14:56 ` cvs-commit at gcc dot gnu dot org
2005-02-25 15:02 ` rth at gcc dot gnu dot org
2005-02-25 15:03 ` schlie at comcast dot net
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