This is the mail archive of the
gcc-patches@gcc.gnu.org
mailing list for the GCC project.
Re: [PATCH] PR tree-optimization/55079: Don't remove all exits of a loop during loop unroll
On Fri, 9 Nov 2012 22:51:45 +0530, Siddhesh wrote:
> I had reckoned that the behaviour could be reverted to what was before
> while I figure out a way to get the warning in place for both cases,
> i.e. with tree-vrp (where max_loop_iterations now causes the loop to
> be folded away in -O2) and this unroll case (in -O1). I'll look at
> getting a warning for the tree-vrp case separately if the infinite
> loop behaviour needs to be retained.
I'm sorry, I won't be able to get this done today. The patch causes a
regression with torture/pr49518.c where it gives out the warning when
it shouldn't. I had seen this warning earlier (with the earlier
behaviour of not removing the exits) and fixed it, but it has reappeared
now, perhaps due to some recent patch that removes more exits or
something else. I'll get back on this late next week since I'll be
offline for most of the week (it's holiday season here in India).
Siddhesh