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[Bug rtl-optimization/50037] Unroll factor exceeds max trip count
- From: "rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Thu, 11 Aug 2011 11:21:34 +0000
- Subject: [Bug rtl-optimization/50037] Unroll factor exceeds max trip count
- Auto-submitted: auto-generated
- References: <bug-50037-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50037
--- Comment #5 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-08-11 11:21:34 UTC ---
(In reply to comment #4)
> (In reply to comment #3)
> > Using
> >
> > int foo (int n, int *addr)
> > {
> > int count, sum;
> > for ( count = n & 0x3; count >= 0; count--, addr++ )
> > sum += *addr;
> > return sum;
> > }
> >
> > it works.
>
> Not for me. It's still unrolled by 7.
Ah, but something cleans up the jump sequence afterwards. At least.
Doesn't happen for the original testcase either.