http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55334
--- Comment #25 from Richard Biener <rguenth at gcc dot gnu.org> 2013-02-13 09:09:09 UTC --- (In reply to comment #24) > Created attachment 29429 [details] > Experimental patch resolving more dependencies > > This is my (untested, highly experimental) patch to resolve such > dependencies. Basically, it 1) treats MEM_REFs as sort-of > COMPONENT_REFs on top INDIRECT_REFs and always pushes the offset index > to access_fns of a data reference structure, and 2) relaxes the rule > that DR_BASE_OBJECTs need to be the same thing for MEM_REFs of DECLs, > where we are happy if the DECLs are the same now. That won't work (read: it will cause miscompiles). I believe with the most recent data-dependence reorg I added a bunch of testcases that show how to create breaking testcases ;)
