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* [Bug optimization/14847] New: [tree-ssa
@ 2004-04-04 16:48 kazu at cs dot umass dot edu
2004-04-04 16:52 ` [Bug optimization/14847] [tree-ssa] combine "if (a & 1) goto there" and "if (a & 4) goto there" kazu at cs dot umass dot edu
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: kazu at cs dot umass dot edu @ 2004-04-04 16:48 UTC (permalink / raw)
To: gcc-bugs
--
Summary: [tree-ssa
Product: gcc
Version: tree-ssa
Status: UNCONFIRMED
Severity: enhancement
Priority: P2
Component: optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: kazu at cs dot umass dot edu
CC: gcc-bugs at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14847
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug optimization/14847] [tree-ssa] combine "if (a & 1) goto there" and "if (a & 4) goto there"
2004-04-04 16:48 [Bug optimization/14847] New: [tree-ssa kazu at cs dot umass dot edu
@ 2004-04-04 16:52 ` kazu at cs dot umass dot edu
2004-04-04 16:56 ` kazu at cs dot umass dot edu
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: kazu at cs dot umass dot edu @ 2004-04-04 16:52 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From kazu at cs dot umass dot edu 2004-04-04 16:52 -------
Convert foo() to baz().
void bar (void);
void
foo (unsigned int a)
{
if (a & 1)
goto heaven;
if (a & 4)
goto heaven;
return;
heaven:
bar ();
}
void
baz (unsigned int a)
{
if (a & 5)
goto heaven;
return;
heaven:
bar ();
}
--
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |pessimizes-code
Summary|[tree-ssa |[tree-ssa] combine "if (a &
| |1) goto there" and "if (a &
| |4) goto there"
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14847
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug optimization/14847] [tree-ssa] combine "if (a & 1) goto there" and "if (a & 4) goto there"
2004-04-04 16:48 [Bug optimization/14847] New: [tree-ssa kazu at cs dot umass dot edu
2004-04-04 16:52 ` [Bug optimization/14847] [tree-ssa] combine "if (a & 1) goto there" and "if (a & 4) goto there" kazu at cs dot umass dot edu
2004-04-04 16:56 ` kazu at cs dot umass dot edu
@ 2004-04-04 16:56 ` pinskia at gcc dot gnu dot org
2004-05-24 19:57 ` [Bug tree-optimization/14847] " pinskia at gcc dot gnu dot org
2005-04-21 0:40 ` kazu at cs dot umass dot edu
4 siblings, 0 replies; 6+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-04-04 16:56 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-04-04 16:56 -------
Confirmed.
--
What |Removed |Added
----------------------------------------------------------------------------
BugsThisDependsOn|14846 |
Status|UNCONFIRMED |NEW
Ever Confirmed| |1
Last reconfirmed|0000-00-00 00:00:00 |2004-04-04 16:56:32
date| |
Target Milestone|--- |tree-ssa
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14847
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug optimization/14847] [tree-ssa] combine "if (a & 1) goto there" and "if (a & 4) goto there"
2004-04-04 16:48 [Bug optimization/14847] New: [tree-ssa kazu at cs dot umass dot edu
2004-04-04 16:52 ` [Bug optimization/14847] [tree-ssa] combine "if (a & 1) goto there" and "if (a & 4) goto there" kazu at cs dot umass dot edu
@ 2004-04-04 16:56 ` kazu at cs dot umass dot edu
2004-04-04 16:56 ` pinskia at gcc dot gnu dot org
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: kazu at cs dot umass dot edu @ 2004-04-04 16:56 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
BugsThisDependsOn| |14846
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14847
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/14847] [tree-ssa] combine "if (a & 1) goto there" and "if (a & 4) goto there"
2004-04-04 16:48 [Bug optimization/14847] New: [tree-ssa kazu at cs dot umass dot edu
` (2 preceding siblings ...)
2004-04-04 16:56 ` pinskia at gcc dot gnu dot org
@ 2004-05-24 19:57 ` pinskia at gcc dot gnu dot org
2005-04-21 0:40 ` kazu at cs dot umass dot edu
4 siblings, 0 replies; 6+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-05-24 19:57 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|3.5.0 |---
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14847
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/14847] [tree-ssa] combine "if (a & 1) goto there" and "if (a & 4) goto there"
2004-04-04 16:48 [Bug optimization/14847] New: [tree-ssa kazu at cs dot umass dot edu
` (3 preceding siblings ...)
2004-05-24 19:57 ` [Bug tree-optimization/14847] " pinskia at gcc dot gnu dot org
@ 2005-04-21 0:40 ` kazu at cs dot umass dot edu
4 siblings, 0 replies; 6+ messages in thread
From: kazu at cs dot umass dot edu @ 2005-04-21 0:40 UTC (permalink / raw)
To: gcc-bugs
--
Bug 14847 depends on bug 14846, which changed state.
Bug 14846 Summary: [tree-ssa] don't use a shift in A & CST_POWER_OF_2 == 0 until very late in tree-ssa optimizations
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14846
What |Old Value |New Value
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |FIXED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14847
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2005-04-21 0:40 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2004-04-04 16:48 [Bug optimization/14847] New: [tree-ssa kazu at cs dot umass dot edu
2004-04-04 16:52 ` [Bug optimization/14847] [tree-ssa] combine "if (a & 1) goto there" and "if (a & 4) goto there" kazu at cs dot umass dot edu
2004-04-04 16:56 ` kazu at cs dot umass dot edu
2004-04-04 16:56 ` pinskia at gcc dot gnu dot org
2004-05-24 19:57 ` [Bug tree-optimization/14847] " pinskia at gcc dot gnu dot org
2005-04-21 0:40 ` kazu at cs dot umass dot edu
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