This is the mail archive of the gcc@gcc.gnu.org mailing list for the GCC project.

Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Re: [ tree-ssa] PRE problem

On Fri, 2004-02-20 at 18:48, Daniel Berlin wrote:

> Um, Diego, when do you think that code was written?
> Last week?
> It hasn't been fundamentally touched in ages (I believe someone touched 
> the generate_vops part when we moved to having VUSE_OPS_PTR).
> 
Dan, what is happening here is that we are only *now* discovering that
the changes made to the copy propagation of pointers were affecting
PRE.  It is not a bug in PRE, so don't get all defensive on me :)

When I introduced propagate_copy and may_propagate_copy, I simply didn't
run into this problem.  The fix is simple, just teach PRE to use the
value propagation API.


Thanks.  Diego.
Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]