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* [Bug c/25206] New: for loop with comma operator problem
@ 2005-12-01 14:46 ymonyak at lipowsky dot de
2005-12-01 15:28 ` [Bug middle-end/25206] " pinskia at gcc dot gnu dot org
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: ymonyak at lipowsky dot de @ 2005-12-01 14:46 UTC (permalink / raw)
To: gcc-bugs
GCC 4.0.1 bilt by GNUARM.
follow source has different read and store address by incrementing of "n".
As result variable "n" will be not changed.
unsigned short CommTxNum;
static void foo (void) __attribute__ ((interrupt ("IRQ")));
void foo(void)
{
unsigned char n;
for (n = 0; n < 3 && CommTxNum; n++, CommTxNum++)
{
...
}
}
--
Summary: for loop with comma operator problem
Product: gcc
Version: 4.0.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: ymonyak at lipowsky dot de
GCC build triplet: 4.0.1
GCC host triplet: windows2000 sygwin
GCC target triplet: arm-elf
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25206
^ permalink raw reply [flat|nested] 6+ messages in thread* [Bug middle-end/25206] for loop with comma operator problem
2005-12-01 14:46 [Bug c/25206] New: for loop with comma operator problem ymonyak at lipowsky dot de
@ 2005-12-01 15:28 ` pinskia at gcc dot gnu dot org
2005-12-01 15:55 ` efim at lipowsky dot de
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-12-01 15:28 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from pinskia at gcc dot gnu dot org 2005-12-01 15:28 -------
HUH? Can you give the full source/ reduced source and give a little more
detailed explication on what is going wrong.
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|c |middle-end
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25206
^ permalink raw reply [flat|nested] 6+ messages in thread* [Bug middle-end/25206] for loop with comma operator problem
2005-12-01 14:46 [Bug c/25206] New: for loop with comma operator problem ymonyak at lipowsky dot de
2005-12-01 15:28 ` [Bug middle-end/25206] " pinskia at gcc dot gnu dot org
@ 2005-12-01 15:55 ` efim at lipowsky dot de
2005-12-01 16:00 ` pinskia at gcc dot gnu dot org
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: efim at lipowsky dot de @ 2005-12-01 15:55 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from efim at lipowsky dot de 2005-12-01 15:55 -------
Subject: Re: for loop with comma operator problem
pinskia at gcc dot gnu dot org schrieb:
>------- Comment #1 from pinskia at gcc dot gnu dot org 2005-12-01 15:28 -------
>HUH? Can you give the full source/ reduced source and give a little more
>detailed explication on what is going wrong.
>
>
>
>
in the file you can see a snapshort with two arrows to read and store
addresses.
It is very simple source.
static BYTE CommTxBuf[COMM_BUF_SIZE];
static BYTE * CommTxBufHead = CommTxBuf;
static BYTE * CommTxBufTail = CommTxBuf;
static WORD CommTxNum = 0;
static void comm_txisr (void) __attribute__ ((interrupt ("IRQ")));
static void comm_txisr(void)
{
DWORD tmp;
BYTE n;
if(CommTxNum)
{
tmp = 0;
for (n = 0; n < 3 && CommTxNum; n++, CommTxNum--)
{
tmp |= (DWORD)(*CommTxBufTail) << ((n + 1) * 8);
if (++CommTxBufTail >= &CommTxBuf[COMM_BUF_SIZE])
CommTxBufTail = CommTxBuf;
}
tmp |= (DWORD)n;
while (comm_putchar(tmp))
;
}
VICVectAddr = 0; // Update VIC priorities
}
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25206
^ permalink raw reply [flat|nested] 6+ messages in thread* [Bug middle-end/25206] for loop with comma operator problem
2005-12-01 14:46 [Bug c/25206] New: for loop with comma operator problem ymonyak at lipowsky dot de
2005-12-01 15:28 ` [Bug middle-end/25206] " pinskia at gcc dot gnu dot org
2005-12-01 15:55 ` efim at lipowsky dot de
@ 2005-12-01 16:00 ` pinskia at gcc dot gnu dot org
2005-12-05 7:34 ` efim at lipowsky dot de
2005-12-05 9:02 ` falk at debian dot org
4 siblings, 0 replies; 6+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-12-01 16:00 UTC (permalink / raw)
To: gcc-bugs
------- Comment #3 from pinskia at gcc dot gnu dot org 2005-12-01 16:00 -------
(In reply to comment #2)
> in the file you can see a snapshort with two arrows to read and store
> addresses.
> It is very simple source.
This source does not show anything, it is not a full source. If you can read
asm, could you point out what is wrong and also could attach a source which
will compile?
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25206
^ permalink raw reply [flat|nested] 6+ messages in thread* [Bug middle-end/25206] for loop with comma operator problem
2005-12-01 14:46 [Bug c/25206] New: for loop with comma operator problem ymonyak at lipowsky dot de
` (2 preceding siblings ...)
2005-12-01 16:00 ` pinskia at gcc dot gnu dot org
@ 2005-12-05 7:34 ` efim at lipowsky dot de
2005-12-05 9:02 ` falk at debian dot org
4 siblings, 0 replies; 6+ messages in thread
From: efim at lipowsky dot de @ 2005-12-05 7:34 UTC (permalink / raw)
To: gcc-bugs
------- Comment #4 from efim at lipowsky dot de 2005-12-05 07:34 -------
Subject: Re: for loop with comma operator problem
pinskia at gcc dot gnu dot org schrieb:
>------- Comment #3 from pinskia at gcc dot gnu dot org 2005-12-01 16:00 -------
>(In reply to comment #2)
>
>
>>in the file you can see a snapshort with two arrows to read and store
>>addresses.
>>It is very simple source.
>>
>>
>
>This source does not show anything, it is not a full source. If you can read
>asm, could you point out what is wrong and also could attach a source which
>will compile?
>
>
>
>
It needed a bit more time to found a problem.
It is NOT a problem of GCC, it is an interrupt which is from a programm
stopped by GDB
before load the new one. The CPU Reset was deaktivated in my GDB .ini file.
Sorry.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25206
^ permalink raw reply [flat|nested] 6+ messages in thread* [Bug middle-end/25206] for loop with comma operator problem
2005-12-01 14:46 [Bug c/25206] New: for loop with comma operator problem ymonyak at lipowsky dot de
` (3 preceding siblings ...)
2005-12-05 7:34 ` efim at lipowsky dot de
@ 2005-12-05 9:02 ` falk at debian dot org
4 siblings, 0 replies; 6+ messages in thread
From: falk at debian dot org @ 2005-12-05 9:02 UTC (permalink / raw)
To: gcc-bugs
------- Comment #5 from falk at debian dot org 2005-12-05 09:02 -------
(In reply to comment #4)
> It is NOT a problem of GCC
OK, let's close it, then.
--
falk at debian dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution| |INVALID
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25206
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2005-12-05 9:02 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
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2005-12-01 14:46 [Bug c/25206] New: for loop with comma operator problem ymonyak at lipowsky dot de
2005-12-01 15:28 ` [Bug middle-end/25206] " pinskia at gcc dot gnu dot org
2005-12-01 15:55 ` efim at lipowsky dot de
2005-12-01 16:00 ` pinskia at gcc dot gnu dot org
2005-12-05 7:34 ` efim at lipowsky dot de
2005-12-05 9:02 ` falk at debian dot org
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