Re: [PATCH GCC]Improve bound information in loop niter analysis

[Jeff Law <law@redhat.com>]

On 08/13/2015 09:06 PM, Bin.Cheng wrote:
>
> Thanks for the comment.
> IIUC, the niter information in struct tree_niter_desc means the number
> of executions of the latch of the loop, so it's 254, rather than 255.
> And same the bound information.  Of course, statements in the loop
> body could execute bound+1 times depending on its position in loop.
> For example, struct nb_iter_bound is to describe number of iterations
> of statements(exit conditions).
Ah, if we go to tree_niter_desc, niter is defined as the # executions of 
the loop latch.  That's what I was missing.  Now back to the real review 
work :-)

jeff