* [Bug c/11245] [3.4 Regression] __asm__ use generates bad code with current CVS gcc
[not found] <20030618215131.11245.fnf@ninemoons.com>
@ 2003-07-09 4:23 ` neroden at gcc dot gnu dot org
2003-07-09 4:25 ` neroden at gcc dot gnu dot org
` (2 subsequent siblings)
3 siblings, 0 replies; 4+ messages in thread
From: neroden at gcc dot gnu dot org @ 2003-07-09 4:23 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=11245
------- Additional Comments From neroden at gcc dot gnu dot org 2003-07-09 04:23 -------
This looks on the surface like a problem with inlining combined with "dead" code elimination.
Does this snippet lose the loop initialization? If it doesn't then presumably inlining is responsible; if it does,
it points elsewhere. :-)
void func ()
{
unsigned long loops = 50000 ;
__asm__ __volatile__ (
".set\tnoreorder\n"
"1:\tbnez\t%1,1b\n\t"
"subu\t%0,1\n\t"
".set\treorder"
: "+r" (loops)
: "0" (loops));
}
^ permalink raw reply [flat|nested] 4+ messages in thread* [Bug c/11245] [3.4 Regression] __asm__ use generates bad code with current CVS gcc
[not found] <20030618215131.11245.fnf@ninemoons.com>
2003-07-09 4:23 ` [Bug c/11245] [3.4 Regression] __asm__ use generates bad code with current CVS gcc neroden at gcc dot gnu dot org
@ 2003-07-09 4:25 ` neroden at gcc dot gnu dot org
2003-07-22 23:11 ` [Bug optimization/11245] " pinskia at physics dot uc dot edu
2003-07-27 22:46 ` pinskia at physics dot uc dot edu
3 siblings, 0 replies; 4+ messages in thread
From: neroden at gcc dot gnu dot org @ 2003-07-09 4:25 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=11245
------- Additional Comments From neroden at gcc dot gnu dot org 2003-07-09 04:25 -------
Also, is it initialized correctly at -O0, or with the __inline__ keyword removed?
^ permalink raw reply [flat|nested] 4+ messages in thread* [Bug optimization/11245] [3.4 Regression] __asm__ use generates bad code with current CVS gcc
[not found] <20030618215131.11245.fnf@ninemoons.com>
2003-07-09 4:23 ` [Bug c/11245] [3.4 Regression] __asm__ use generates bad code with current CVS gcc neroden at gcc dot gnu dot org
2003-07-09 4:25 ` neroden at gcc dot gnu dot org
@ 2003-07-22 23:11 ` pinskia at physics dot uc dot edu
2003-07-27 22:46 ` pinskia at physics dot uc dot edu
3 siblings, 0 replies; 4+ messages in thread
From: pinskia at physics dot uc dot edu @ 2003-07-22 23:11 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=11245
pinskia at physics dot uc dot edu changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed|2003-06-19 03:40:41 |2003-07-22 23:11:19
date| |
------- Additional Comments From pinskia at physics dot uc dot edu 2003-07-22 23:11 -------
Here is the reduced sources:
void func ()
{
unsigned long loops=10;
__asm__ __volatile__ (
".set\tnoreorder\n"
"1:\tbnez\t%0,1b\n\t"
"subu\t%0,1\n\t"
".set\treorder"
: "+r" (loops)
);
}
And it works at -O0.
This is with the mainline (20030719).
^ permalink raw reply [flat|nested] 4+ messages in thread* [Bug optimization/11245] [3.4 Regression] __asm__ use generates bad code with current CVS gcc
[not found] <20030618215131.11245.fnf@ninemoons.com>
` (2 preceding siblings ...)
2003-07-22 23:11 ` [Bug optimization/11245] " pinskia at physics dot uc dot edu
@ 2003-07-27 22:46 ` pinskia at physics dot uc dot edu
3 siblings, 0 replies; 4+ messages in thread
From: pinskia at physics dot uc dot edu @ 2003-07-27 22:46 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=11245
pinskia at physics dot uc dot edu changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |FIXED
------- Additional Comments From pinskia at physics dot uc dot edu 2003-07-27 22:46 -------
Fixed on the mainline (20030727).
^ permalink raw reply [flat|nested] 4+ messages in thread