This is the mail archive of the
gcc-patches@gcc.gnu.org
mailing list for the GCC project.
Re: PATCH: PR target/46519: Missing vzeroupper
On Wed, Jan 5, 2011 at 8:46 AM, Jakub Jelinek <jakub@redhat.com> wrote:
> On Wed, Jan 05, 2011 at 08:39:51AM -0800, H.J. Lu wrote:
>> On Tue, Jan 4, 2011 at 4:09 PM, Mark Mitchell <mark@codesourcery.com> wrote:
>> > On 1/4/2011 4:06 PM, H.J. Lu wrote:
>> >
>> >> Enhance the DF infrastructure is beyond my resources. ?I
>> >> will take a look at the DF algorithm.
>> >
>> > Wikipedia (or any good compiler book) should have a good description of
>> > the appropriate work-list based algorithms. ?The basic idea is that you
>> > walk the BB tree in the right order (starting at the entry blocks),
>> > adding successor blocks to the worklist whenever you change a block.
>> >
>>
>> Are there any existing GCC passes which implement their own data-flow
>> analysis?
>
> E.g. var-tracking.c (vt_find_locations).
>
Thanks.
--
H.J.