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Re: PATCH: PR target/46519: Missing vzeroupper
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).
Jakub