[Bug tree-optimization/49599] FRE/DSE not performing well on aggregates

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49599

--- Comment #2 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-12-16 09:18:40 UTC ---
FRE does not handle removal of redundant aggregate stores, so it does not
remove the aggregate assignment

  *p_1(D) = l;

DSE does not handle redundant store removal either, and the store is
obviously not dead.

I think SRA should remove the aggregate store.