[Bug tree-optimization/41486] cselim is not dse aware

[matz at gcc dot gnu dot org]

------- Comment #4 from matz at gcc dot gnu dot org  2009-09-28 12:08 -------
tree-ssa-sink doesn't sink anything with vuses in it, and if that weren't the
case then not any global store.  And it isn't totally trivial to make it sink
that.  It also doesn't move stuff into the post-dominator (not profitable).
I don't think it's tree-ssa-sink to do something for the first case as it
not only requires sinking, but also transforming the RHS.  That's something
that sinking simply doesn't do.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41486