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* [Bug c/11772] New: Incorrect code generated with -mrtd and long long
@ 2003-08-02 17:11 mikulas at artax dot karlin dot mff dot cuni dot cz
2003-08-02 17:16 ` [Bug c/11772] " pinskia at physics dot uc dot edu
` (5 more replies)
0 siblings, 6 replies; 7+ messages in thread
From: mikulas at artax dot karlin dot mff dot cuni dot cz @ 2003-08-02 17:11 UTC (permalink / raw)
To: gcc-bugs
PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11772
Summary: Incorrect code generated with -mrtd and long long
Product: gcc
Version: 3.3
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: mikulas at artax dot karlin dot mff dot cuni dot cz
CC: gcc-bugs at gcc dot gnu dot org
GCC build triplet: i586-pc-linux-gnu
GCC host triplet: i586-pc-linux-gnu
GCC target triplet: i586-pc-linux-gnu
When using gcc in an environment where -mrtd is default calling convention, gcc calls long long operations like __divdi3 without -mrtd (on the other hand, it honours -mregparm when calling these functions). The resulting code crashes, because stack is incremented twice --- once at the end of __divdi3 and next after return to calling function.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c/11772] Incorrect code generated with -mrtd and long long
2003-08-02 17:11 [Bug c/11772] New: Incorrect code generated with -mrtd and long long mikulas at artax dot karlin dot mff dot cuni dot cz
@ 2003-08-02 17:16 ` pinskia at physics dot uc dot edu
2003-08-02 17:17 ` mikulas at artax dot karlin dot mff dot cuni dot cz
` (4 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: pinskia at physics dot uc dot edu @ 2003-08-02 17:16 UTC (permalink / raw)
To: gcc-bugs
PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11772
pinskia at physics dot uc dot edu changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c/11772] Incorrect code generated with -mrtd and long long
2003-08-02 17:11 [Bug c/11772] New: Incorrect code generated with -mrtd and long long mikulas at artax dot karlin dot mff dot cuni dot cz
2003-08-02 17:16 ` [Bug c/11772] " pinskia at physics dot uc dot edu
@ 2003-08-02 17:17 ` mikulas at artax dot karlin dot mff dot cuni dot cz
2003-08-02 17:21 ` pinskia at physics dot uc dot edu
` (3 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: mikulas at artax dot karlin dot mff dot cuni dot cz @ 2003-08-02 17:17 UTC (permalink / raw)
To: gcc-bugs
PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11772
mikulas at artax dot karlin dot mff dot cuni dot cz changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords|wrong-code |
------- Additional Comments From mikulas at artax dot karlin dot mff dot cuni dot cz 2003-08-02 17:17 -------
This is test code for the bug:
long long __divdi3(long long a, long long b)
{
return a + b;
}
f()
{
volatile int x = 1;
long long a1 = 4, a2 = 2;
/*long long a = __divdi3(a1, a2);*/
long long a = a1 / a2;
if (x != 1) abort();
return a;
}
main()
{
return f();
}
compile it with -fomit-frame-pointer -mrtd flags. When you run it, it fails in Abort function, because value of variable `x' changed because stack pointer is incorrect in function f.
When you look at assembler, you see that __divdi3 exits with ret $16 and there's additional addl $16, %esp after calling __divdi3.
Mikulas
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c/11772] Incorrect code generated with -mrtd and long long
2003-08-02 17:11 [Bug c/11772] New: Incorrect code generated with -mrtd and long long mikulas at artax dot karlin dot mff dot cuni dot cz
2003-08-02 17:16 ` [Bug c/11772] " pinskia at physics dot uc dot edu
2003-08-02 17:17 ` mikulas at artax dot karlin dot mff dot cuni dot cz
@ 2003-08-02 17:21 ` pinskia at physics dot uc dot edu
2003-08-05 14:43 ` pinskia at physics dot uc dot edu
` (2 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: pinskia at physics dot uc dot edu @ 2003-08-02 17:21 UTC (permalink / raw)
To: gcc-bugs
PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11772
pinskia at physics dot uc dot edu changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c/11772] Incorrect code generated with -mrtd and long long
2003-08-02 17:11 [Bug c/11772] New: Incorrect code generated with -mrtd and long long mikulas at artax dot karlin dot mff dot cuni dot cz
` (2 preceding siblings ...)
2003-08-02 17:21 ` pinskia at physics dot uc dot edu
@ 2003-08-05 14:43 ` pinskia at physics dot uc dot edu
2003-08-23 1:07 ` [Bug target/11772] " dhazeghi at yahoo dot com
2003-11-23 7:14 ` [Bug target/11772] Incorrect code generated with -mrtd and long long (most builtins) pinskia at gcc dot gnu dot org
5 siblings, 0 replies; 7+ messages in thread
From: pinskia at physics dot uc dot edu @ 2003-08-05 14:43 UTC (permalink / raw)
To: gcc-bugs
PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11772
pinskia at physics dot uc dot edu changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever Confirmed| |1
Last reconfirmed|0000-00-00 00:00:00 |2003-08-05 14:43:14
date| |
------- Additional Comments From pinskia at physics dot uc dot edu 2003-08-05 14:43 -------
I can confirm this on the mainline (20030805).
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug target/11772] Incorrect code generated with -mrtd and long long
2003-08-02 17:11 [Bug c/11772] New: Incorrect code generated with -mrtd and long long mikulas at artax dot karlin dot mff dot cuni dot cz
` (3 preceding siblings ...)
2003-08-05 14:43 ` pinskia at physics dot uc dot edu
@ 2003-08-23 1:07 ` dhazeghi at yahoo dot com
2003-11-23 7:14 ` [Bug target/11772] Incorrect code generated with -mrtd and long long (most builtins) pinskia at gcc dot gnu dot org
5 siblings, 0 replies; 7+ messages in thread
From: dhazeghi at yahoo dot com @ 2003-08-23 1:07 UTC (permalink / raw)
To: gcc-bugs
PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11772
dhazeghi at yahoo dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|3.4 |---
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug target/11772] Incorrect code generated with -mrtd and long long (most builtins)
2003-08-02 17:11 [Bug c/11772] New: Incorrect code generated with -mrtd and long long mikulas at artax dot karlin dot mff dot cuni dot cz
` (4 preceding siblings ...)
2003-08-23 1:07 ` [Bug target/11772] " dhazeghi at yahoo dot com
@ 2003-11-23 7:14 ` pinskia at gcc dot gnu dot org
5 siblings, 0 replies; 7+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2003-11-23 7:14 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2003-11-23 07:14 -------
Most likely the same bug as PR 12769.
--
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed|2003-08-05 14:43:14 |2003-11-23 07:14:41
date| |
Summary|Incorrect code generated |Incorrect code generated
|with -mrtd and long long |with -mrtd and long long
| |(most builtins)
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11772
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2003-11-23 7:14 UTC | newest]
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2003-08-02 17:11 [Bug c/11772] New: Incorrect code generated with -mrtd and long long mikulas at artax dot karlin dot mff dot cuni dot cz
2003-08-02 17:16 ` [Bug c/11772] " pinskia at physics dot uc dot edu
2003-08-02 17:17 ` mikulas at artax dot karlin dot mff dot cuni dot cz
2003-08-02 17:21 ` pinskia at physics dot uc dot edu
2003-08-05 14:43 ` pinskia at physics dot uc dot edu
2003-08-23 1:07 ` [Bug target/11772] " dhazeghi at yahoo dot com
2003-11-23 7:14 ` [Bug target/11772] Incorrect code generated with -mrtd and long long (most builtins) pinskia at gcc dot gnu dot org
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