https://gcc.gnu.org/bugzilla/show_bug.cgi?id=47769
Bug 47769 depends on bug 105735, which changed state.
Bug 105735 Summary: GCC failed to reduce &= loop_inv in loop.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105735
What|Removed |Added
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=47769
--- Comment #7 from Hongtao.liu ---
>
> This is obviously horrible, but the right answer isn't btr in a loop, it's
> what clang does:
>
> movabsq $7905747460161236406, %rax # imm = 0x6DB6DB6DB6DB6DB6 every
> third bit unset
>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=47769
Andrew Pinski changed:
What|Removed |Added
Severity|minor |enhancement
Last
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=47769
Peter Cordes changed:
What|Removed |Added
CC||peter at cordes dot ca
--- Comment #6
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47769
--- Comment #5 from Matthias Kretz kretz at kde dot org 2013-05-03 11:45:49
UTC ---
Another ping.
The bug status is still WAITING...
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47769
Paolo Carlini paolo.carlini at oracle dot com changed:
What|Removed |Added
Status|WAITING
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47769
--- Comment #4 from Matthias Kretz kretz at kde dot org 2012-03-29 09:55:46
UTC ---
ping.
Are you still waiting for more input from me?
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47769
--- Comment #2 from Matthias Kretz kretz at kde dot org 2011-02-17 10:00:55
UTC ---
Created attachment 23375
-- http://gcc.gnu.org/bugzilla/attachment.cgi?id=23375
Test code to see whether btr gets used automatically and to compare speed
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47769
--- Comment #3 from Matthias Kretz kretz at kde dot org 2011-02-17 10:01:34
UTC ---
Created attachment 23376
-- http://gcc.gnu.org/bugzilla/attachment.cgi?id=23376
TimeStampCounter class for benchmarking
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47769
Richard Guenther rguenth at gcc dot gnu.org changed:
What|Removed |Added
Keywords|
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