PATCH: PR target/46519: Missing vzeroupper

[H.J. Lu]

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?

Thanks.

-- 
H.J.