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[Bug target/62147] missed loop counter based optimization
- From: "segher at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Sat, 16 Aug 2014 18:29:36 +0000
- Subject: [Bug target/62147] missed loop counter based optimization
- Auto-submitted: auto-generated
- References: <bug-62147-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62147
Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|powerpc64le |powerpc64*-*
Status|UNCONFIRMED |NEW
Last reconfirmed| |2014-08-16
CC| |segher at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Confirmed, on powerpc64 with default tuning.
-m32 generates bdnz just fine.
Using a different limit (as in your code comment)
doesn't help.
Using long int instead of int does work.
The ivopts pass thinks using the pointer as loop
counter is cheapest.