http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39326
--- Comment #40 from Richard Biener <rguenth at gcc dot gnu.org> 2013-03-08 09:12:38 UTC --- (In reply to comment #31) > (In reply to comment #30) > Hmm, RTL PRE isn't really mine either, but I probably know it as well as > anyone else, so I will have a look. It's probably a similar issue as for > gimple LIM: alias checks. > > Can you attach your TLC patches for gimple LIM to this PR, please? Found it on some testing machine. I merged it and saw to it that it compiles and passes tree-ssa.exp (some ???s remain, I've added a TODO). The idea should be clear, and it's memory savings only and it will eventually be a bit slower (unless it is optimized further).
