https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115344
--- Comment #5 from Andi Kleen ---
Also the other problem is that doloop optimization is only for known bounds,
while generic reversal works for unknown too
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115344
--- Comment #4 from Andi Kleen ---
Pedantry aside the basic problem is that doloop optimization depends on the
target supporting doloop, but the loop reversal would be useful everywhere.
So there are two options: add doloop to every target of i
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115344
--- Comment #3 from Andrew Pinski ---
(In reply to Andi Kleen from comment #2)
> x86 doesn't have hardware do loops, it's only for some obscure targets like
> some DSPs.
Actually doloop was added to support rs6000(powerpc)'s loop counter regist
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115344
Andi Kleen changed:
What|Removed |Added
CC||andi-gcc at firstfloor dot org
--- Comment
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115344
Richard Biener changed:
What|Removed |Added
Status|UNCONFIRMED |NEW
Ever confirmed|0
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115344
Andrew Pinski changed:
What|Removed |Added
Severity|normal |enhancement
