This is the mail archive of the
gcc-patches@gcc.gnu.org
mailing list for the GCC project.
Re: [patch] Use a smaller, dynamic worklist in compute_global_livein
On Tue, Aug 7, 2012 at 11:52 AM, Richard Guenther
<richard.guenther@gmail.com> wrote:
> So I wonder why simply looping over all SSA defs in a loop body and checking
> whether a use is outside of it is not enough to compute this information ...
> (yes, we might end up creating too many loop closed PHIs, namely on all
> exits rather than just on those that the name is live over, but ... at
> least maybe we can prune it with DOM info)
I've been thinking the same thing, but I don't understand loop-closed
SSA form well enough to try and rewrite it along those lines.
Ciao!
Steven