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* [Bug tree-optimization/45032] New: Missed optimization in ifcvt/crossjump
@ 2010-07-22 18:52 rth at gcc dot gnu dot org
2010-07-22 20:58 ` [Bug tree-optimization/45032] " steven at gcc dot gnu dot org
2010-07-22 21:05 ` pinskia at gcc dot gnu dot org
0 siblings, 2 replies; 4+ messages in thread
From: rth at gcc dot gnu dot org @ 2010-07-22 18:52 UTC (permalink / raw)
To: gcc-bugs
int f(int x, int y);
int g(int x, int z)
{
int r;
if (z == 0)
r = f(x, 1);
else
r = f(x, 0);
return r + 1;
}
could be optimized to
r = f(x, (z == 0 ? 1 : 0));
which would reduce the size of the generated code, and for
most targets allow further simplifications on the COND_EXPR
leading to branchless assembly.
--
Summary: Missed optimization in ifcvt/crossjump
Product: gcc
Version: 4.6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: rth at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45032
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug tree-optimization/45032] Missed optimization in ifcvt/crossjump
2010-07-22 18:52 [Bug tree-optimization/45032] New: Missed optimization in ifcvt/crossjump rth at gcc dot gnu dot org
@ 2010-07-22 20:58 ` steven at gcc dot gnu dot org
2010-07-22 21:05 ` pinskia at gcc dot gnu dot org
1 sibling, 0 replies; 4+ messages in thread
From: steven at gcc dot gnu dot org @ 2010-07-22 20:58 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from steven at gcc dot gnu dot org 2010-07-22 20:58 -------
Looks related to bug 20070.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45032
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug tree-optimization/45032] Missed optimization in ifcvt/crossjump
2010-07-22 18:52 [Bug tree-optimization/45032] New: Missed optimization in ifcvt/crossjump rth at gcc dot gnu dot org
2010-07-22 20:58 ` [Bug tree-optimization/45032] " steven at gcc dot gnu dot org
@ 2010-07-22 21:05 ` pinskia at gcc dot gnu dot org
1 sibling, 0 replies; 4+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2010-07-22 21:05 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from pinskia at gcc dot gnu dot org 2010-07-22 21:05 -------
I think this is the same as PR 13563.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45032
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug tree-optimization/45032] Missed optimization in ifcvt/crossjump
[not found] <bug-45032-4@http.gcc.gnu.org/bugzilla/>
@ 2021-08-19 5:21 ` pinskia at gcc dot gnu.org
0 siblings, 0 replies; 4+ messages in thread
From: pinskia at gcc dot gnu.org @ 2021-08-19 5:21 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=45032
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |DUPLICATE
Status|NEW |RESOLVED
--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This is a dup of bug 13563.
*** This bug has been marked as a duplicate of bug 13563 ***
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2021-08-19 5:21 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2010-07-22 18:52 [Bug tree-optimization/45032] New: Missed optimization in ifcvt/crossjump rth at gcc dot gnu dot org
2010-07-22 20:58 ` [Bug tree-optimization/45032] " steven at gcc dot gnu dot org
2010-07-22 21:05 ` pinskia at gcc dot gnu dot org
[not found] <bug-45032-4@http.gcc.gnu.org/bugzilla/>
2021-08-19 5:21 ` pinskia at gcc dot gnu.org
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