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* [Bug tree-optimization/53253] New: Missed opportunity to inline memcmp
@ 2012-05-06 4:08 law at redhat dot com
2012-05-06 4:54 ` [Bug tree-optimization/53253] " pinskia at gcc dot gnu.org
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: law at redhat dot com @ 2012-05-06 4:08 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53253
Bug #: 53253
Summary: Missed opportunity to inline memcmp
Classification: Unclassified
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: law@redhat.com
Compile with -O2. Note the length of the memory to be compared via memcmp is
fixed and just 2 bytes. It'd be more efficient and possibly smaller to just
inline the necessary comparisons. Seems to me this ought to be addressed in
our tree optimizers.
int foo(const char* x) {
return memcmp(x,"xx",2) != 0;
}
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug tree-optimization/53253] Missed opportunity to inline memcmp
2012-05-06 4:08 [Bug tree-optimization/53253] New: Missed opportunity to inline memcmp law at redhat dot com
@ 2012-05-06 4:54 ` pinskia at gcc dot gnu.org
2012-05-06 4:56 ` pinskia at gcc dot gnu.org
2012-05-07 9:25 ` rguenth at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: pinskia at gcc dot gnu.org @ 2012-05-06 4:54 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53253
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2012-05-06
Ever Confirmed|0 |1
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> 2012-05-06 04:50:47 UTC ---
Confirmed.
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug tree-optimization/53253] Missed opportunity to inline memcmp
2012-05-06 4:08 [Bug tree-optimization/53253] New: Missed opportunity to inline memcmp law at redhat dot com
2012-05-06 4:54 ` [Bug tree-optimization/53253] " pinskia at gcc dot gnu.org
@ 2012-05-06 4:56 ` pinskia at gcc dot gnu.org
2012-05-07 9:25 ` rguenth at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: pinskia at gcc dot gnu.org @ 2012-05-06 4:56 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53253
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> 2012-05-06 04:55:21 UTC ---
Related also to PR 12086.
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug tree-optimization/53253] Missed opportunity to inline memcmp
2012-05-06 4:08 [Bug tree-optimization/53253] New: Missed opportunity to inline memcmp law at redhat dot com
2012-05-06 4:54 ` [Bug tree-optimization/53253] " pinskia at gcc dot gnu.org
2012-05-06 4:56 ` pinskia at gcc dot gnu.org
@ 2012-05-07 9:25 ` rguenth at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: rguenth at gcc dot gnu.org @ 2012-05-07 9:25 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53253
Richard Guenther <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |DUPLICATE
--- Comment #3 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-05-07 09:22:57 UTC ---
This is a dup of 52171. RTL/expand parts are tracked in PR12086.
*** This bug has been marked as a duplicate of bug 52171 ***
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2012-05-07 9:25 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
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2012-05-06 4:08 [Bug tree-optimization/53253] New: Missed opportunity to inline memcmp law at redhat dot com
2012-05-06 4:54 ` [Bug tree-optimization/53253] " pinskia at gcc dot gnu.org
2012-05-06 4:56 ` pinskia at gcc dot gnu.org
2012-05-07 9:25 ` rguenth at gcc dot gnu.org
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