------- Comment #18 from rguenth at gcc dot gnu dot org 2010-02-22 10:27 ------- (In reply to comment #17) > Is there a way to pass alignment information similar to PR 39954?
Well, that wasn't really a true fix but simply restored the (broken) behavior of earlier compilers so the 4.5 regression is gone ... > Otherwise, a proper fix would be some inter-procedural analysis... Meantime, > we > can do intra-procedural analysis and fail when we reach function argument, > i.e, > use runtime checks. We already have several types of versioning, so adding > another one will complicate the things even more, and will not always be > possible (because of code size constrains). Yes, we need to propagate (mis-)alignment information properly. My plan for 4.6 is to add (mis-)alignemnt information to SSA_NAME_PTR_INFO and have a simple propagator computing it. Richard. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42652
