public inbox for gcc-bugs@sourceware.org
help / color / mirror / Atom feed
* [Bug rtl-optimization/18146] if-conversion is not performed for some reason
[not found] <bug-18146-5009@http.gcc.gnu.org/bugzilla/>
@ 2007-07-25 19:44 ` steven at gcc dot gnu dot org
2008-09-09 1:45 ` pinskia at gcc dot gnu dot org
1 sibling, 0 replies; 4+ messages in thread
From: steven at gcc dot gnu dot org @ 2007-07-25 19:44 UTC (permalink / raw)
To: gcc-bugs
------- Comment #3 from steven at gcc dot gnu dot org 2007-07-25 19:44 -------
This may be fixed now by my cfglayout work.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18146
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug rtl-optimization/18146] if-conversion is not performed for some reason
[not found] <bug-18146-5009@http.gcc.gnu.org/bugzilla/>
2007-07-25 19:44 ` [Bug rtl-optimization/18146] if-conversion is not performed for some reason steven at gcc dot gnu dot org
@ 2008-09-09 1:45 ` pinskia at gcc dot gnu dot org
1 sibling, 0 replies; 4+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2008-09-09 1:45 UTC (permalink / raw)
To: gcc-bugs
------- Comment #4 from pinskia at gcc dot gnu dot org 2008-09-09 01:44 -------
It was not fixed by the cfglayout changes. In fact tree switch conversion
makes the code even worse even though we don't need it really.
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |pinskia at gcc dot gnu dot
| |org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18146
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug rtl-optimization/18146] if-conversion is not performed for some reason
2004-10-25 16:43 [Bug rtl-optimization/18146] New: " kazu at cs dot umass dot edu
2004-10-25 17:01 ` [Bug rtl-optimization/18146] " pinskia at gcc dot gnu dot org
@ 2005-04-25 2:14 ` pinskia at gcc dot gnu dot org
1 sibling, 0 replies; 4+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-04-25 2:14 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2005-04-25 02:14 -------
We get now on the mainline:
foo:
cmpl $5, %eax
movl %eax, %ecx
ja .L2
movl $1, %eax
movl $1, %edx
sall %cl, %eax
testb $42, %al
je .L2
movl %edx, %eax
ret
.p2align 4,,7
.L2:
xorl %edx, %edx
movl %edx, %eax
ret
I think the problem is really that we have multiple predecessors or something like that. If we lowed the
switch at the tree level, then PHI-OPT would catch this.
--
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed|2005-01-24 00:57:13 |2005-04-25 02:14:13
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18146
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug rtl-optimization/18146] if-conversion is not performed for some reason
2004-10-25 16:43 [Bug rtl-optimization/18146] New: " kazu at cs dot umass dot edu
@ 2004-10-25 17:01 ` pinskia at gcc dot gnu dot org
2005-04-25 2:14 ` pinskia at gcc dot gnu dot org
1 sibling, 0 replies; 4+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-10-25 17:01 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-10-25 17:01 -------
Confirmed.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever Confirmed| |1
Last reconfirmed|0000-00-00 00:00:00 |2004-10-25 17:01:28
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18146
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2008-09-09 1:45 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
[not found] <bug-18146-5009@http.gcc.gnu.org/bugzilla/>
2007-07-25 19:44 ` [Bug rtl-optimization/18146] if-conversion is not performed for some reason steven at gcc dot gnu dot org
2008-09-09 1:45 ` pinskia at gcc dot gnu dot org
2004-10-25 16:43 [Bug rtl-optimization/18146] New: " kazu at cs dot umass dot edu
2004-10-25 17:01 ` [Bug rtl-optimization/18146] " pinskia at gcc dot gnu dot org
2005-04-25 2:14 ` pinskia at gcc dot gnu dot org
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).